Ok so I realize that you posted this a while back but being new I'm curious what you found out? It sounds to me from what the majority of people are saying on these forums is that basically public land is ok schools and parks, private land a person needs permission and all other land such as state, federal etc. are all a no go, which is understandable because it's really probably all about money and who won't get paid whatever if whatever valuable is found. Does public land include public cemeteries?