I have one idea you may want to try. I use a quad and sled on my line, but your truck could be used the same way. Along my trail, if I see a good backing for a flat set, like a rotten stump for example, I will run my quad off the trail and leave a track about 6-10" away from the backing. I continue past the backing and then park and walk back in the track and make my set. The advantage to this is my trap is off the main trail and the critter has an easy walk to the lure still. When I backtrack, I stay on the main trail and all thats left is a little arc to the side. Anyone else coming along, will almost always take the straight through trail and my trap will remain intact. After a snowfall, I will lift my trap, drive past the backing and reset my trap.