Need AK-friendly full-time fifth wheel! Ideas?

BTW We kept a 6' red leash with harness on our cat when traveling or moving the slides so that we would know where he was. Our cat easily adapted and it was a non issue. Litter box in the closet with the door propped open 6". He rarely got the leash caught on something.

Mornin, Fulltiming in that Jayco that long has no doubt already taught you some about full timing in an RV. I was in Maryville last year during the sub zero period in my Winnie. Everyone in the campground froze it seemed.
First point, on the 36' 5er, do you have a truck that can handle a 16,000 pound rig? Your talking one ton diesel territory.
You mention mid bunk, bunkhouse? second bed area? or did you mean something else? Loft? How many people do you need sleeping arrangements for? Mid bunk unit example Grand Design
As to brands, The upper tier Keystones, (Alpine, Avalanche Montana), are popular and generally well regarded, other brands offering comparable units are Jayco, KZ, Forest River, Heartland, Northwood, and Grand Design.
For starters, most mid tier units, and all upper end should have the enclosed underbelly, ducted heating, and heated tanks in some form. And in that size range, washer/drier prep is pretty standard.
Solar? how much? Panels can be installed on most any unit, solar prep is often so small in the wiring that it becomes useless for installation of anything more than a battery tender.
Res fridge, is an option on most rigs the size you are looking at.
Well insulated? there is only so much insulation in a 2 inch thick wall, four slides tend to make a unit even harder to heat and cool. What you may want to consider is if the units you are looking at have the ability to be used with at least a couple of the slides in. That flexibility could help once in a while.
Insulated double pane windows are available, at a cost. Cushions in the vent openings help too.
Hope some of this helps, happy hunting.

The Kenai Peninsula is fantastic beautiful area so congratulations on that choice. My first and only choice would be a New Horizons FW which are custom made in Junction City, KS. They are custom build quality units that are second to none IMHO. You might find a used one that meets your requirements. Yes they will be higher priced.

Hopefully pianotuna who has spent winters in Canada with his RV will chime in and offer ideas. Or locate a post and PM him. And some other posters have spent winters in a RV...