I never considered this, and it lies outside of my ability to verify so there's not much I can comment on. Though, you might find the following quote and page on set and setting interesting:
"Of course, the drug dose does not produce the transcendent experience. It merely acts as a chemical key — it opens the mind, frees the nervous system of its ordinary patterns and structures. The nature of the experience depends almost entirely on set and setting. Set denotes the preparation of the individual, including his personality structure and his mood at the time. Setting is physical — the weather, the room's atmosphere; social — feelings of persons present towards one another; and cultural — prevailing views as to what is real. It is for this reason that manuals or guide-books are necessary. Their purpose is to enable a person to understand the new realities of the expanded consciousness, to serve as road maps for new interior territories which modern science has made accessible
— Timothy Leary, The Psychedelic Experience: A Manual Based on the Tibetan Book of the Dead"
http://en.wikipedia.org/wiki/Set_and_setting
My psychonaut days have been over for a long time. But, if you find this helpful, feel free to PM me with any questions you have and maybe it'll jog my old memory of something that might be interesting / useful from that subculture.