I’m not aware of a particular vehicle that is well-suited to Arctic off-road/overloading for any length of time (BV-206 and the newer “Viking” notwithstanding...those things are fantastic but get ready to maintain a huge parts block and become something of a mechanic). The “buggies” that roam over snow on Yellowstone roads and the Icelandic Toyotas that can cross some glaciated terrain can “go there” somewhat but are perhaps not what you’re talking about. Sir Edmund Hillary and many others have journeyed across Polar regions in motorized convoys on both tracked and wheeled vehicles and I’m sure there have been solo vehicle journeys as well. I would posit that going “off-road” into the taiga and tundra would represent the pinnacle of vehicle capability and driver/explorer experience. Simply driving the haul road/dalton, etc. and camping and maintaining your rig in between northern AK/Canadian towns and villages is a worthy challenge, but relatively straightforward with some planning and prep....but mistakes can be costly when the weather can kill, obviously. I don’t know your background and experience of course, but it sounds like you might really benefit from a few shorter trips to the far north from your home in Virginia. A few weeks in a cabin or camping in the Arctic/subarctic at different times of the year (each of the three northern seasons: winter, summer and mud, has its own charm) would provide a measure of safety and let you develop some fundamentals to help you begin planning and getting out on your expedition. You will learn a good deal each day about cold & austere environment, diesel vs gasoline, medical/first aid, battery life, clothing, foot and hand wear, skis vs snowshoes, food/water, snow/ice driving, tire chains, nav/route plannning, communications, interpersonal dynamics, staying dry and clean, etc. (and maybe something about bears but they don’t usually present much of an “attack” threat vs vehicles and normally alert/prepared humans). It is not a long apprenticeship, for example like alpinism/mountaineering, but living in the cold is far easier and can be very rewarding with the right skills, experience and patience. A few weeks of long Arctic nights in a cabin/tent when it is snowing and blowing just outside is a good time to sit down with your notebook and pencil and start looking at maps, winter logistical requirements and figuring out what sort of vehicle and travel goals might work for you.