Thanks for the post, glad to get any info that I can. I would kindly remind you of one thing that I am sure you already know:
There is sometimes a disparagement between the "applicable law" and the "it's just you, me, and this here shotgun"-type law, which tends to rule the immediate roost when situations like this arise.
IE, that ziploc baggie full of "legal documentation" is only gonna be good for one thing when the old boy comes down and tells you to get the hell off his land.. And it ain't gonna do jack (in the immidiate) for protecting your rights, or for your health..
Just thought it worth mentioning. Doesn't mean you can't come back later with a Sheriff, I spose..
(note: I am not a land owner, but I have had enough encounters with local land owners to see that they don't give a darn about the "Applicable Law")