Domicile can be tricky - luckily, we have experienced attorneys! Since we just became full time RVer's, this is a first for us to try and determine where and how to become domiciled in a state of our choice.Register your RV and get a driver's license in that state. In short, you have one, and only one domicile; however, you may have many residences—in theory you could have a residence on every street, everywhere. In MA we use my mom's address for our "permanent" residence. We can have packages mailed to our campground, but for all mail it's thru a PO Box. Confused about the best states for full-time RVer domiciles? Here's a quick glance at the top three states and why full-timers choose to call them home. Hi. Diane and I intend to become fulltimers very soon. We would appreciate any advice you can give us on residency problems.