I was talking with a guy that works for a large outfitter (in one of the states that is somewhere South of Montana and North of New Mexico). He told me that they had occasional problems with clients that used their service for deer or pronghorn and would in later years trespass on their leased property to hunt on their own. It sounds like they would consider legal action anytime they could absolutely prove the trespass, but other times they would not.

He told me about one guy that did this to them, was seen on the property by one of the guides, and of course claimed he was only hunting nearby public land. I do not know the hunter but apparently he is now a big internet expert on hunting in that area.