Quick back story--a friend sold his house in MA and hooked up his old camper trailer and went walkabout. For almost a year he has wandered about the country, staying at campgrounds and state parks. As his old camper was deteriorating he bought a newer one in Utah a few weeks ago. Now he needs to register it somehow--he has a MA driver's license and PO box, but no actual permanent residence in the state. Apparently MA requires proof of residence to register a vehicle; what other states require I do not know. He is currently in AZ, but has no legal residence there. Anyone have any ideas?