Honestly, I don't think most pilots around here would mind doing it. If you have the money I would say go for it. There are few areas I can think of where you couldn't find at least some accessible public land in a hunt area without air access though. Certainly there are some big chunks that are landlocked where this would be a fun way to gain access.
Regarding the legality aspect, from what I know I don't think it is illegal. I believe the Wyoming regulations state something along the lines of it being illegal to use aircraft to spot wildlife. If you are simply transporting yourself to a hunt site I think this would be considered legal. In this case I would contact the local warden and let him know what you are up to just in case. You would want to check with the WGFD and possibly the FAA to make sure on this though.