RV Boondocking on city streets - where is it legal?

pitch wrote:
Just as an aside, It is not legally trespassing until I am asked to leave and then refuse. Signs mean only that you intend to prosecute if don't comply with your request to leave.

Where did you come up with this? In Montana, private property, no trespassing, means "NO TRESPASSING", not you have to leave if you get caught. As soon as you cross a fence marked with a no trespassing sign you have broken the law. I would think that would be the interpretation of the law most places.