? ?Hi. My name is Dick Mutsch and my wife's name is Lila. We're about to become full timers. Our house is sold and we're going to buy a GMC diesel truck and a 34 ft. Cardinal fifth wheel. We have a lot of questions about that lifestyle. The two most important are, if you buy a rig in a state with no sales tax, what are the requirements? Do you have to establish residency with a PO box or some other way? The other is, How do mail forwarding services work?Thanks, Dick