In Montana we have a pretty good hunter harassment law, not sure what state you're having the run ins; if not Montana check and see if that state has a similar law.
Having video would definitely be a plus.
Obviously you'd want to call the game warden for a hunter harassment case, not sure what a deputy could do.
Same deal here in Washington. Been there and the warden gave me his cell and was eager to bust the perp because of repeated complaints.