Those ones that look totally abandon probably belong to Sluester. I know he had seven or eight of them up there and nothing would make him happier then for you to climb in one and whack a doe out of it.
Public land, go ahead and sit in it. But don’t forget it does it belong to somebody else ,be respectful. the ones that look like garbage might have a big buck hanging around it because nobody sits in it . look for deer sign around those.