I get the impression that the well furnished Ayahuasca tourist experience has not been the predominant one for very long. I have met a great number of people who stayed in very rustic conditions to endure their Ayahuasca experience.
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If you feel nauseated from mushrooms, you may try psilacetin instead. It is shrooms without the shroom matter, available (not sure if still is, used to be) in a small-ish tablet form.