I have seen videos and also talked to folks who by necessity are living in RV's in the Bakken oil fields of North Dakota.
Horrible winter conditions for any RV, no matter the manufacturer.
Appears many are parked over their water supply, instead of alongside of it, to help prevent freeze up. Then fiberboard, or plywood, or even hay bales for insulation around the outside. Then huge bottles of propane plumbed into their system sitting outside each camper.
And these folks can still open their kitchen cabinets and find frost conditions inside the upper cabinets.
Brutal.
I feel sorry for those folks, and for anyone buying a used RV that has been used over winter in that area.
For despite all these folks attempts at keeping their RV's warm, the condensation issues, interior frost damage has probably ruined most of those trailers.