Choosing between a private and a group psilocybin retreat is less about which format is better and more about the conditions in which you feel safe enough to let go. A group can offer connection, shared experience and community. A private retreat offers privacy, undivided attention and greater flexibility. Research does not currently show that one format is inherently superior; preparation, setting, support and integration may matter at least as much as the format itself.
How to choose the space where you can safely let go
When I started exploring this field myself, I found plenty of research but very little practical guidance on what to consider when choosing a guided session outside a clinic. That gap is one reason I wrote my book The Potential of Psychedelics. This article draws on it, and on the research behind it, to help you make that choice with more clarity.
In short: Neither format is better in general. A group offers connection and shared witnessing. A private session offers undivided attention, privacy, and a process shaped around you. Both can be meaningful. What matters is not only whether a retreat is private or group-based, but whether the setting is well prepared, well staffed, psychologically safe and properly integrated afterwards.
| Private retreat | Group retreat | |
| Attention | Focused on one participant | Shared across several participants |
| Facilitator ratio | Usually one-to-one, or with a small dedicated team | Often around 1 facilitator to 3–6 participants, depending on the retreat |
| Individual tailoring | Highly tailored to your history, needs, intention and what arises during the process | Some individual adaptation may be possible, but the structure must also serve the group as a whole |
| Pace and rhythm | Can follow your own emotional, physical and psychological rhythm | Usually follows a shared programme, schedule and group rhythm |
| Space holding | The facilitator can stay closely attuned to shifts in your process throughout the experience | Attention and space holding are distributed across participants |
Privacy | High | Lower |
| Community | Less central during the experience, although connection with the facilitator can be very deep | Often an important part of the experience, through shared presence, witnessing and connection |
| Flexibility | More room to slow down, pause, change direction or stay longer with what is unfolding | Usually less flexible because timing and structure need to work for everyone |
| Cost | Usually higher | Often lower |
| May suit people who… | Need privacy, individual pacing, close attunement, or tend to monitor and adapt to others | Value connection, shared experience, community and being witnessed by others |
Why the format matters
The idea of set and setting — your inner state and your outer environment — goes back to the early 1960s, when it was popularised by Timothy Leary. Science historian Ido Hartogsohn has traced how much the effects of these substances depend on expectation, environment, and culture, not just on chemistry.
Robin Carhart-Harris and his colleagues at Imperial College made a similar point in their paper on the essential importance of context. In a prospective study, Eline Haijen and colleagues found that how prepared, comfortable, and able to surrender people felt was linked to how their experiences went. And in Roland Griffiths’ well-known 2006 study at Johns Hopkins, about two-thirds of participants rated their session among the most meaningful experiences of their lives. That study was built around careful preparation, a comfortable room, and trained facilitators.
So “private or group?” is not only a matter of taste. It is a question about setting, and setting is part of the work. And perhaps an even more important distinction is this: not simply private versus group, but well-held versus poorly held.
What a private session can offer
In my book, I describe an individual session as a process that can be tailored to you, with the facilitator’s full attention on your specific needs. It is often the natural choice for deeply personal themes, such as grief, a relationship ending, or a question you have carried for years. It also suits people with very specific wishes.
For some people, the difference between a group and a private setting is much larger than they initially expect. We are relational beings. Even when we are trying to focus inward, part of us often remains aware of who else is in the room, what they are feeling, and how we ourselves are being perceived.
In practice, that tends to mean four things.
Attention that isn’t divided. Your facilitator knows your context, your questions, and what you might need if things become difficult. Preparation focuses on what you want to explore, and integration picks up from the same point of understanding, so nothing has to be explained twice.
This continuity can matter. A psychedelic experience may bring forward memories, emotions, body sensations or parts of yourself that are difficult to understand in isolation. When the person sitting with you already knows your history, your protective patterns and your intention, they can stay more closely attuned to what is unfolding, even when you are not able or do not want to put it into words.
Flexibility. You may arrive with a clear intention, but what emerges from your deeper psyche or body may take the process in a different direction. The pacing can follow you rather than a programme. If what you need is silence, rest, more time with what is unfolding, or space for the process to move at its own pace, there is room for that.
That flexibility also applies to the preparation. Some people need more time before they feel ready. Others discover during preparation that their original intention is not really the question underneath. In a private process, there is more room to follow that rather than fit the person into a fixed structure.
Privacy of the inner world. Even in a well-held group, part of us stay aware of other people. Am I too loud? What will they think if I cry? In IFS (Internal Family Systems) language, this may be a protective part scanning the room. It isn’t a flaw. It is doing a job, often one it learned a long time ago.
For people who tend to adapt, take care of others, monitor the atmosphere, compare themselves, or feel responsible for how other people are doing, this can be especially relevant. Even during a psychedelic experience, these patterns do not necessarily disappear. Sometimes they become more visible.
Many people find that behind a closed door, with one person they trust, that vigilance can soften more fully.
A steady relational presence. Feeling safe with the person accompanying you matters. A calm, responsive and unhurried facilitator can help create the interpersonal conditions in which difficult emotions can be approached rather than avoided. In a private session, that attention is not divided between several participants.
Judith Herman’s work on trauma recovery begins from a related principle: safety comes first, before difficult material can be explored.
A private psilocybin session, at its best, is closer to a deep therapeutic immersion than to an event. Everything is shaped around one person. The preparation begins with your history and your questions. The room is arranged for your comfort. The days are paced by what happens inside you, and the person sitting with you has no one else to attend to.
There is space for long silences, for tears without an audience, for laughter that arrives out of nowhere. There can also be space to move between closeness and distance: to ask for someone nearby, or to be left quietly with what is unfolding, depending on what feels right and safe.
Afterwards, the same person who prepared you helps you make sense of what surfaced.
It is quiet, precise, and tenderly attuned to who you are and what you are ready to explore. It also asks something of you: to be willing to be seen by one person, without the buffer of a group.
What a group can offer
Group sessions offer connection and shared insight. Human beings are relational, and being surrounded by people who have arrived with similar questions can loosen the feeling that our struggles are uniquely ours.
Hannes Kettner and colleagues call this psychedelic communitas. They found that a sense of shared experience during group sessions predicted lasting increases in wellbeing and social connectedness.
That relational dimension can be powerful. Someone else’s courage may make it easier to access your own. Being witnessed without having to explain everything can reduce shame, and hearing other people’s experiences afterwards can broaden the meaning you make of your own.
Research in clinical settings suggests that group models can make psychedelic-assisted care more accessible by sharing professional time across participants. Retreat settings are different: guidance may be provided by facilitators, therapists or psychologists, and costs vary widely depending on the size of the group, the level of support, the location and the way the retreat is structured.
But group size and staffing matter enormously
In my book I share the story of a woman who attended a three-day truffle retreat with 25 participants and only four facilitators. There was no preparation, no integration, and everyone received the same high dose. When fear came up, she asked for someone to stay with her, but the facilitators were busy with others. She could not surrender to the experience, felt unsafe, and struggled with the aftermath for a long time.
That story is not an argument against groups.
It is an argument for asking how many people are in the room and who is there for you.
A well-run group retreat can be very different. With adequate preparation, a thoughtful facilitator-to-participant ratio, clear boundaries and skilled support, the group itself may become part of what makes the experience meaningful.
What research tells us about private and group psychedelic settings
Research points fairly consistently to the importance of context, rapport, preparation and support.
What research does not yet allow us to say with confidence is that professionally facilitated private and group psilocybin retreats produce equivalent outcomes. Direct comparisons are still limited.
Naturalistic research by Byrne and colleagues suggests that both individual and group psychedelic use can be experienced as beneficial, and that group use is common and acceptable. But naturalistic group versus solo use is not the same as comparing a professionally guided private retreat with a professionally guided group retreat.
So the evidence does not support a simple claim that one format is inherently superior to the other.
Your own sense of safety is therefore an important part of the decision, alongside screening, the quality of the facilitator, the setting, staffing, preparation and integration.
Which environment helps you let go?
Imagine you are about to enter an experience where you cannot know what will arise. Notice what your body says before your mind does.
- Where would I feel safer: in a room with others, or behind a closed door?
- Do I tend to look after other people’s feelings, even when I’m the one struggling?
- Would I hold back tears, laughter, movement, or silence if others were watching?
- Or would being alone with my process feel heavier than being in company?
- Is my question deeply personal, or is part of me longing for community?
- Which would feel harder: being seen by many people, or by one?
- When I am in a group, do I naturally stay connected to myself, or does part of my attention move towards everyone else?
- Do I need the reassurance of others nearby, or does their presence make it harder for me to turn inward?
None of your answers says anything about how open or brave you are. It only tells you something about the conditions in which you can surrender control.
Surrender in this work is not passivity. It is trust, and trust usually needs safety first.
Whatever you choose: what to check
These questions matter at least as much as the format. They come from my book, particularly Chapters 8 to 10.
Screening. A responsible retreat asks about your medical and psychological history. That includes medication use, relevant physical conditions and personal and family psychiatric history. Depending on the person and the setting, medical screening may also include factors such as blood pressure and cardiovascular risk. Some medications require particular medical attention, and there are medical and psychiatric circumstances in which a psychedelic experience may be inappropriate or carry increased risk. If you are unsure, consult a qualified doctor first.
A retreat that skips thorough screening is a warning sign.
Preparation and dosage. How many preparatory sessions are there, and are any of them one-to-one? Is dosage discussed and adapted where appropriate, or is everyone given the same amount?
Are you free to say “no” at the last moment?
An intention can give direction to the process, but it should not become another task to complete. I often think of it as a compass rather than a goal.
The facilitator. Ask about training, professional background, experience with altered states, and the type of people they usually work with. Certification can be useful, but on its own it does not tell you whether someone is able to create a safe and trustworthy relationship.
Then, with the practical questions answered, notice how you feel in their presence.
This is not a soft extra. It is part of the assessment.
Have a first conversation before you commit to anything, and let your body answer. Do your shoulders drop or rise? Can you ask an awkward question and receive a clear, unhurried answer? Do you feel free to say “I’m not sure yet”? Does this person make room for your doubts, or smooth them over?
Your gut is not infallible. A nervous system shaped by unsafe experiences can mistake the familiar for the safe, and some parts of you may simply want to please. So let it guide you alongside the practical checks, not instead of them.
If something feels off and you cannot say why, that is reason enough to wait.
Safety protocols. Who is present if something goes wrong? How many participants is each facilitator responsible for? Is anyone trained to work with people in altered states, and how quickly can medical help be reached?
In a private setting, ask what happens if the facilitator is the only person there and additional support becomes necessary. In a group setting, ask how the team responds if several people need support at the same time.
Boundaries. Ask how the facilitator handles consent, including touch, and what they do to keep the relationship clear. A good facilitator welcomes these questions. Chapter 9 of my book goes into this in more depth.
Aftercare and integration. Can you come down calmly at the location? Is someone available afterwards? What does integration involve, and for how long?
Integration is where insight can gradually become part of daily life. As Marc Aixalà and others have described, that process may continue well beyond the session itself. Research on challenging psychedelic experiences also suggests that how an experience is understood and worked with afterwards can strongly influence its longer-term meaning.
A sharing round can be valuable, but it is not necessarily the same as individual integration work.
Legal and practical realities. Laws differ by country and change over time. Check the current legal situation in the country where the retreat takes place, as well as the credentials and working practices of anyone you consider.
A few questions worth asking any retreat directly:
- How much preparation is there, and how much of it is one-to-one?
- What is the facilitator-to-participant ratio?
- What is your protocol if someone becomes distressed?
- How do you handle consent and boundaries?
- What integration support is included, and for how long?
- Who is medically responsible if something unexpected happens?
- Can the process or dosage be adapted to the individual, or does everyone follow the same protocol?
A quiet closing thought
Perhaps the better question isn’t “Which retreat is best?” but:
“What kind of space would let me be most fully present with myself?”
For some people, that is a circle of others moving through something together. For others, it is a quiet room, a trusted facilitator, and nowhere else to be.
I should be honest with you: in my own work I mostly guide people one-to-one, so I do have a lean. Over the years, I have seen how much can change when someone no longer has to divide their attention between their own inner world and the people around them. For some, that privacy creates a degree of freedom they did not realise they needed.
I have tried to describe both formats as fairly as I can, because both can be done well, and both can be done badly.
The format matters. But the quality of the container around the experience matters even more.
If you’d like to talk through what might suit you, you are welcome to get in touch. There is no pressure and no right answer.
And if you are already leaning one way, what is it about that space that draws you?
This article is for information and reflection. It is not medical advice. If you have a medical or psychiatric history, or take medication, speak with a qualified professional before considering any psychedelic experience.
References
Byrne, K. J., Lindsay, S., Baker, N., Schmutz, C., & Lewis, B. (2023). In naturalistic psychedelic use, group use is common and acceptable. Journal of Psychedelic Studies. https://doi.org/10.1556/2054.2023.00261
Carhart-Harris, R. L., Roseman, L., Haijen, E., et al. (2018). Psychedelics and the essential importance of context. Journal of Psychopharmacology, 32(7), 725–731. https://doi.org/10.1177/0269881118754710
Gashi, L., Sandberg, S., & Pedersen, W. (2021). Making “bad trips” good: How users of psychedelics narratively transform challenging trips into valuable experiences. International Journal of Drug Policy, 87, 102997. https://doi.org/10.1016/j.drugpo.2020.102997
Griffiths, R. R., Richards, W. A., McCann, U., & Jesse, R. (2006). Psilocybin can occasion mystical-type experiences having substantial and sustained personal meaning and spiritual significance. Psychopharmacology, 187(3), 268–283. https://doi.org/10.1007/s00213-006-0457-5
Haijen, E. C. H. M., Kaelen, M., Roseman, L., et al. (2018). Predicting responses to psychedelics: A prospective study. Frontiers in Pharmacology, 9, 897. https://doi.org/10.3389/fphar.2018.00897
Hartogsohn, I. (2017). Constructing drug effects: A history of set and setting. Drug Science, Policy and Law, 3, 1–17. https://doi.org/10.1177/2050324516683325
Herman, J. L. (1992). Trauma and Recovery. Basic Books. https://www.basicbooks.com/titles/judith-lewis-herman/trauma-and-recovery/9780465098736/
Johnson, M., Richards, W., & Griffiths, R. (2008). Human hallucinogen research: Guidelines for safety. Journal of Psychopharmacology, 22(6), 603–620. https://doi.org/10.1177/0269881108093587
Kettner, H., Rosas, F. E., Timmermann, C., Kärtner, L., Carhart-Harris, R. L., & Roseman, L. (2021). Psychedelic communitas: Intersubjective experience during psychedelic group sessions predicts enduring changes in psychological wellbeing and social connectedness. Frontiers in Pharmacology, 12, 623985. https://doi.org/10.3389/fphar.2021.623985
Marseille, E., Stauffer, C. S., Agrawal, M., et al. (2023). Group psychedelic therapy: Empirical estimates of cost-savings and improved access. Frontiers in Psychiatry, 14, 1293243. https://doi.org/10.3389/fpsyt.2023.1293243
Schwartz, R. C. (2021). No Bad Parts. Sounds True. https://www.soundstrue.com/products/no-bad-parts
Stubbé, N. (2025). Het potentieel van psychedelica [The Potential of Psychedelics]. Uitgeverij SWP. https://www.swpbook.com/boeken/9/psychologie/2627/het-potentieel-van-psychedelica
Neither format is better in general. Research does not currently show that one is inherently superior, and direct comparisons between professionally guided private and group retreats are still limited. Preparation, setting, staffing, psychological safety and integration may matter at least as much as the format itself. The right choice is the setting in which you feel safe enough to let go.
A private retreat gives you your facilitator’s undivided attention, a process tailored to your history and intention, and a pace that follows your own rhythm. There is more room to slow down, pause or change direction, and more privacy for tears, silence or movement without an audience. It often suits deeply personal themes such as grief, and people who tend to monitor or adapt to others. It is usually more expensive than a group retreat.
A group offers connection, shared experience and being witnessed by others. Research by Kettner and colleagues found that a sense of shared experience during group sessions, which they call psychedelic communitas, predicted lasting increases in wellbeing and social connectedness. Group retreats usually follow a shared programme and are often less expensive.
Notice what your body says before your mind does. Where would you feel safer: in a room with others, or behind a closed door? Would you hold back tears, laughter or silence if others were watching? Do you tend to look after other people’s feelings, even when you are the one struggling? Or would being alone with your process feel heavier than being in company? Your answers say nothing about how open or brave you are. They tell you something about the conditions in which you can surrender control.
