Howdy!
I like your style - how you write and how you keep the rig light, compact, and simple. What part of MT if I may ask? I lived west of Missoula for a while. And I had a BMW track car once whose numbers were 008...
I'm slowly getting into building my own expedition vehicle, also on a Toyota but much older. The idea of a tent has been pitched (no pun intended) to me a few times, but having lived and wanting to spend more time in places like southern Manitoba, Iceland, and eastern Europe, I'm leaning in favor of rigid walls full of high-efficiency insulation (rigid boards of polyurethane or polyisocyanurate), even if that means cramped quarters and a little extra weight. What's the coldest you've camped in yours, and how has it fared?
I read the OP and saw that you were carrying propane, but using gasoline for the cooking stove. I've been using the latter setup, and questioning continuing to do so. Propane is cheaper, doesn't smell, and doesn't need to be hand-pumped for longer meals. Tanks are a little more awkward than gas cans, but there's plenty of room underneath to mount one. And I realize the logistical efficiency of having one type of fuel for everything, but is there another reason you're using liquid vs. gas for cooking?