I tend to laugh at the effort to associate bison with Wyoming. Every time Food Network or some magazine does a "Best Burger in All 50 States" type of deal, it always comes down to a horrible bison burger for Wyoming. You will never see a right minded Wyoming local order a bison burger. Never. Wyoming ranches supply beef to some of the best restaurants in the world. French Laundry and El Bulli both have used Wyoming beef.
I split a cow from a ranch north of town once a year with my neighbor. The idea of going in on a side of bison has never come up, no matter how many beers find their way out of their cooler.