...and they still do. I vacationed in Northern AZ last year and it sure was apparent that the Native Americans pretty much ran the show.
No problem with that, other than the inability to have a beer for three days.
The natives from the Shoshone-Bannock reservation can't have alcohol on the reservation, so they come into Pocatello and Chubbuck to get drunk. Nothing like a whoopin', hollerin', spittin' nasty native in the back seat of a squad car. They put spit hoods on them because they are given to spitting on police officers...drunk or not. The natives tend to forget that they need a valid driver's license when driving off the reservation. Cars have to be registered and insured too. You don't want to be on Yellowstone avenue between the bars and the reservation at closing time. You're likely to be run down by a drunk native speeding to the reservation with the headlights off. Lots of fun.