Good job I've had a similar problem a guy was on my land in a stand my cousin has well I asked my cuz if he minded me sitting there one morning he had no problem with it so Monday mornin gets there I go to get in the stand there's a guy in it and he tells me that he has permission to hunt it I said oh really who the f*** gave it to you he said some name I never herd so I told him well it's not there land it belongs to my dad and my uncle and we don't like tresspassers and that he needs to leave and if I see him on it again I'd call the DNR had no trouble from him since.