While this totally sucks, I'm really interested in how this plays out. It sounds like you're well ahead of the game at this point.

If these folks have no regard for the law, and law enforcement has their hands tied, I don't know how the land owner gets made whole.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."