RE: Someone else hunting in my stand...
Guys, poachers will hunt your land without stands, removing the stand won't help...
You've got to find out if your Dad gave him permisson and proceed from there...
You mentioned that he drove a truck into your field...If it's determined that he doesn't have permission, tell him so and post the land heavily and put up a gate/fence whatever you need to let him know you are serious...
If it continues, then get the sheriff involved...Trespassing is hard to enforce and hard to prove, unfortunately these guys know it...