Tresspassing ID of truck?

[tooln]

I wonder what they did in the 16 minutes between the first and second pic. That's a long time to be trespassing with a vehicle at night.

Someone went parking for a quickie.

 

[Bucks&Ducks]

I agree with otheres the square box looks like an older model (early 90's). Height of the camera should give you a good guess if its full size pick up or not. That trim line running near the top of the outside of box and the interior of the box makes me lean towards Ford (1990ish Ranger).

Hard to tell if there is less stuff in the box for sure but it may have been a trip to dump stuff on your land. Follow tracks or openings to where they may have went. What they dumped would probably give you more clues.