Re: What's best 5th Wheel for Winter full time
For the kind of winter that can take place up there you will need one of the very best, and you will need to skirt it as well. There are not many on this list. At the top currently would be the Mobile Suites, and used would be Teton. Teton is no longer being built. Both of these are very heavy RVs and if at all large will require a medium duty truck to tow as no pink-up is big enough.
New Horizons builds custom and if you buy new you can probably get the extra insulation that will be needed. An absolute must will be dual pane windows and as much insulation as you can get. And it will be very expensive to heat the RV as propane is costing near $3/gallon and you can expect to need at least 15 gallons per week in the colder part of the winter. You will also probably need a good dehumidifier to keep moisture down.
There are not now, and never have been many RV manufacturers who build RVs to deal with the kind of weather that you can expect there.