So, this is rapidly approaching and its definitely time to start getting my ducks in a row.
Tires should be covered (thanks Nitto!!!), putting an oil pan heater pad on, may go ahead and put a fresh quality battery in before leaving. Usual maintenance items, oil change using 5w-30. Make sure the washer fluid is ultra-cold rated (been caught by that one before...). See where I can improve on insulation, driving a 2dr JK (hardtop), not known for their excessive warmth. Other things to think about?
Clothing wise, unsure. Possibility of some pretty frigid temps so the first impulse is to gear up on antarctic expedition stuff (because who doesn't like cool, extreme stuff). But realistically, we will be sitting in a vehicle for many hours each day. A lot of bulky clothing will just a be a hindrance. Multiple layers is the answer, but how far do you go. Merlino wool (or synthetic blend, i.e Smartwool) base layer for sure, then various midlayers, maybe multiple. The key is being able to shed/add them easily. An outer parka is easy enough (relatively) to take off/on inside the vehicle, but lowers not so much. Granted, the intent is not to be spending a lot of time outside the vehicle, but you have to be prepared. For lowers - Base Layer>mid-insulated pants/bib>only if really needed outer layer that's rarely used?
We are to be prepared to spend the night in the vehicle, because, well ******** happens. Have the sleeping bags covered, will have a small white gas stove (propane/butane is a no go out the potential temps). Extra 5gal of fuel (maybe 10). Probably bring a small tent, not necessarily as a shelter, but as a small area that can be somewhat protected from the elements to deal with things that could come up. And of course the myriad of cameras, GoPros, chargers and associated paraphernalia. Crap, why didn't my wife get a 4dr
Trying to not overthink this, but I got nothing else to do right now so into the world of cranial intercourse I go. I mean people live and work in this environment, we're just passing through.
