Hi freek_zero,
I've never long term winter camped, but I have used my RV at -37 C (-34 F) with only 15 amp shore power.
I've boondocked for a week where the maximum temperature was -27 C (-15 F). I did run a generator for about 5 hours per day. I was not in the RV in the day time and used my stove top as a blue flame heater while I was not inside. The furnace was turned down as low as it would go during day time--not to conserve propane but to conserve battery power.
I did not run the generator while sleeping. I did use a 12 volt electric heating blanket.
I don't know about Class A rv's but I can tell you that a Class C is quite "sure footed" in snow.
So, yes, it is quite possible to travel and camp in extreme cold.
freek_zero wrote:
Having said that, there is one thing I haven't been able to figure yet: almost all the winter RVing talk is focused on setting up long term in a park. I'm looking to stay mobile, not more than a few days at any given spot, and preferably not in a park. Is this all but impossible? Or doable so long as one stays out of -40 temps and doesn't expect a summer's day inside temp? (I am at 15C or less inside at home anyway, so I'm quite happy with cool interior temps) I'm guessing the biggest issues are going to be heating costs (even with a good insulated setup), and finding a place to get water and dump.