Peyote anybody?

I have tripped Mushrooms and Acid before and have enjoyed both immensely(though Mushrooms more probably-not a big fan of the burn out of acid-for me anyway).But I was wondering if anybody here has every eaten Peyote cactus or even if anybody has consumed just the mescaline before.I'm very interested in tripping on this stuff.I hear it's extremely intense.
And also, does anybody know just how hard it is to find in the midwest?I'm planning on going to Burning Man next year and hope to find some there.