From my time on the res, I believe the 2 favorite canned drugs are Aquanet and Butter Flavored Pam.
At least, those were the cans strewn about outside their filthy, Neolithic hovels.
I used to do a lot of camping across the Western US.
I have traversed many a res.
The only National Park in America with an alcohol ban is Canyon de Chelly.
The ban is because it is wholly surrounded by a res.
I observed congenital birth defects amongst the inhabitants, with poor vision being the most obvious.
I attributed it to booze and huffing, but maybe I’m way off base.