I don't really believe an awful lot of what he wrote, now. I've been with the Tarahumaras and they have a kind of creationist religion that seems part original paganism and astrolgy, part Catholicism. I did go to a shamanic wedding which was cool. I did not go into the smoke tent. There were people staggering out again and vomiting. The police came to ask what the fuck we were doing but on hearing it was an indigenous ceremony, buggered off again.
At the time the first book came out, I sucked it up. 20 buttons would be like an Owsley pill, 400 mikes of acid, which was my first experience (I tripped for 14 hours, experienced no-time, and saw aliens walking amongst us.)
I still need 4 more plants. I've got seed from mine so intend growing them.