Again, probably a local bylaw issue depending on where you live. Within city limits, probably not allowed. That was the case when I checked into it when my parents had a house in a subdivision. The city said I can park an RV on the driveway, as long as it doesn't overhang a sidewalk or any city property AND nobody can live in it. It can only be parked for storage. That said, outside the city in rural areas, most areas are quite lenient and would either not care (unless you caused problems or disturbances to someone) or maybe there's no regulation against it. But as mentioned, I'm not sure I'd want to stay the winter in an Airstream in Bozeman MT. I'm struggling right now with what to do if I have to stay in a similar climate this winter to be with my elderly parents who are in a nursing home - I won't be able to stay at their house because they sold. I either stay in the Airstream or rent an apartment (probably cheaper once I take into consideration the cost of propane for heating, and just trying to find a place to park it for the winter).
1990 Airstream Excella 25 Double
2012 Chrysler Town & Country Touring-L with the Can-Am Special Hitch