I have been in this situation before. My land and my cousins land boarder each other. He is not a deer hunter and has given me permission to act as if I owned it.

I once found two very nice expensive stands set up on my cousins land. I informed my cousin and he told me to take the stands if I wanted them. I decided to leave a note at each stand telling them they were trespassing and to remove the stands immediatly. The next time I checked the stand were still there and they had been hunted out of. I was really ticked. Called my cousin at noon and told him I will be delivering two stands to his house. He said bring em, I' ll sell them or give them to a nephew.

I hate trespassers.