JohnBud,
A couple questions and comments...Don't you have the roads gated or cabled? How did the truck get in? If he went around a gate...then it's time to get the tractor out and mound up some dirt mounds. Where I hunt, we try to keep the gates shut all the time and park the hunting vehicles so they can't be seen from the main road. I have noticed that many people leave their gates open when they are in the woods hunting and that's a dead giveaway to the trespassers the landowners/leasees are there. In that instance, when the gate is shut...the coast is clear to trespass. 4 wheelers are a real problem around here with the trespassing. And lately, there have been a lot of thefts at the hunt clubs. Big items like tractors and such. Trespassing mean thefts later in time, so you need to be vigilant with your land and nip it in the bud.