WE have the same problem herewe hunt a old tree farm 2yrs ago a girl on horse back rode up on me in my stand she said sorry and left no prob next day 2 guy,s came in from the bush behind the farm to cut tree,s .They asked me what do u think your doing in here I told them and showed them the permission slip I had from the tree farm owner my name with the rest of the group and along with what we were hunting for and a description of our trucks and plate #,s.They turned around and left we found out they had been doing this for a couple of years they were charged with trespassing,theft they left a gd trail back to their farm.