Justin Jarrett Wapit Ridge Outfitters is a good choice.
He is a stand up guy and runs a good camp with good guides and horses.
Had a very enjoyable wilderness hunt with him
Yellowstone Outfitters is excellent - great remote camp - I've been twice with them
Trispoke Outfitters is also incredible - got two bulls with my son two years ago and saw more bulls than I've ever seen on a hunt. More likely to have some open spots, as well.