profdant139, our camping goals are similar to yours, with a little larger upper limit on size. I've been researching brand for many months. Below are my current conclusions.
The Lance 1475 (with All Weather Package and without slide) appears to be very well designed for freezing temperatures. On YouTube
Lance has 25 videos; several discuss the tanks, insulation, heating systems. The Truma Combi for heat and hot water was introduced in 2018. Dry weight is 2600 lbs. A small lift is optional.
Olivers also appear to be very suitable for winter, but they're heavy (and expensive).
I can't find much information about Bigfoots; they do claim "enclosed heated tanks".
The new InTech Sol claims to have the fresh tank (28 gal) above the floor. I'm trying to see one to determne if water lines are also protected.
The Winnebago Micro Mini claims to have "enclosed and heated tanks", but I don't care for the styling.
The water systems in the following trailers appear to be unsuitable for freezing conditions:
- nuCamp TAB 400 (awesome Alde hydronic heating, but unprotected water system)
- Little Guy Max
- Safari Condo
- Black Series HQ15
Does anyone know if the Airstream Nest or Basecamp handle freezing conditions?