yes the landowner has the right to say what the rules are, especially if you are hunting for free. On the other hand if I am paying to hunt his land and have a signed lease I want to hunt anyway I see fit (within the rules of law obviously). If the lease document is silent about antler restrictions, and the like I would argue he has no right to come in after the fact and say "no shooting does" or "only bucks with 3 points per side" etc.