It's a big canyon too, second biggest in the state. Probably every hunter with that tag looking for a bigger bull will be there, along with their guides, family members, guides family members, second cousins, etc.
Pressure on the edge of the canyon will be intense to say the least, especially if you haven't experienced the late rifle hunt in that unit yet. Down in the canyon there will be less pressure but also significantly fewer bulls than along the edges. The water in the canyon is typically seasonal...