Only one way to deal with the road hunter is to turn him in. same with the trespassers. get the plate number on there truck and possible a picture of it on private property.
Some are going to tell you to confront them and try talking to them.
Well don't.
(1. they are drinking.
(2. they have no problem looking at you thru a fire arm scope.
Be so easy for the slobs to shoot you and call it a hunting accident. Just call the law and let them handle it.
I tried the talking to them bit, and they were sober and only them getting a huge fine stopped them in their tracks.
Al