RE: I think I found a poachers' set!
I'd take the stand down.Then I'dset upa cheap trail cam where he will not be able to see it nearthe tree. I'd leave a note on the tree and politely state that you'd like to talk to him to arrange giving him back his stand.
Make sure you let him know that he was tresspassing and tell him not to return to your property. I'd also let him know that the land is under surveillance.