cpd, going to hunt buffalo at Routiers in a year or two. it's a ranch hunt, but don't forget that the ranch consists of over 50,000 acres. lot of looking right there. and once you find them, you still have to make the stalk to get the shot. and once you make the shot, you still have to drop the critter. without getting your rear end run over. saw a video on another site I go to where the buffalo was shot three times, all good shots as you could see the shot placements on the video, and it took a fourth shot to drop the thing. 2 shots were to the head, and 2 to the chest. unbelievable. and I'm going to bow hunt the things.
other than that, you would probably have to check out the western states to see what bison hunts they have and the draw procedures. good luck.