Here in small town Tyler Texas, they are moving into the woods just outside of town. They are setting up tents, pulling in trailers, and old RV's. They tend to stay to themselves during the day, but then at night, they are wondering onto farms and rural homes. I don't have any numbers on what's being stolen, but from what I've heard, it's becoming an issue that is increasing.
So far, I haven't seen it myself, but a buddy that hunts on my land at night had an encounter with a group of them on another property that he was hunting on. They where taking stuff from the landowners barn when he saw them. He called the landowner, and the landowner called the police. They didn't catch the people, but could see where they went with his stuff, but they where unable, or unwilling, to do anything to get his stuff back. The politics of it all seems to be the biggest issue.