The original question made no mention of large tracts. So I did not even think about the posting laws - how much work would it be to post 40 acres? He is right about most of us though - we can not just go out and buy 400+ acres in multiple states. Heck, I can not even buy 20 acres of additional land in my own state. But if you have 100's of acres of prime hunting land, I think even signs and laws will not keep trespassers out.