One of the ranches I hunt and an adjoining ranch have 3 school (state) sections totally surrounded and locked up. Each one is 640 acres (1 sq mile)and the one I don't hunt has an outfitter and yep....its their private playground! Its kinda funny because I have hunted the adjoining ranch for years and because one side of 1 of the state parcel borders the ranch. The other ranch has it fenced and posted. I just climb the fence and go hunting. The outfitter stopped me one year and was really ticked off because I had killed a really nice buck deer that he wanted for a client. When he saw that the adjoining ranch owner had signed my license and I told him it was state land that I had legal access to, he stomped off swearing ti himself.
Moral of the story is you have to know what you can & can't do.