As stated before its public land and everyone has a right to be there. You definately need alot of patients. As a general rule if you can see another hunter your probably to close. I sometimes think some guys just scout around and see another stand and set up close by. It's happened to me a few times. The one time I talked with a young bowhunter that was setup abit close, I was courtious and we told hunting stories for about an hour. I even gave him some helpful info about the area. You have to have the mindset that other hunters are probably going to mess up a few of your hunts, so be persistant! Thats why I have 6 treestands setup and a few natural blinds prepared.
