Lots of conclusion jumping here. Maybe his "access" is only the small part which the father does own? In such case he is legal and 300 yds isa HUGE buffer to anyone's stand. Maybe he can explain further, but there seems like it all could be legit. I hunt a very similar situation. there's a woodlot behind the house, I only own (and hunt) a slice of it. Sometimes there are 2-3 other hunters back there and there sure isn't anywhere close to 300 yds between us, but we all get along and try not to hunt when someone else is there.