One thing is for certain, if you are on BLM, and either a rancher or oil and gasshole person tries to run you off illegally you need to report it to the BLM Ranger (Law Enforcement Officer in the closest district office).
If you look up BLM's website each area will have the ranger's contact details available.
They fine the heck out of anyone illegally blocking access to public land.
Of course in Wyoming they get detailed out to search for people tresspassing via ATV into wilderness areas, so most of the BLM rangers are not where they normally work during the hunting season. But you might get lucky.
In Montana they have game warden wildlife violation ticketing authority, or did last time I was there.
In Wyoming the BLM and the G&F aren't so close.