Vancouver to Prince George, west to the Cassier Hwy, north to just west of Watson Lake, then take the Alcan all the way into Fairbanks. The Cassier is a little rough in places with about 12 miles of gravel. The Alcan had frost heaves through the Yukon before you get to the US border. From the US border to Fairbanks was okay, not great. Whenever you see frost heaves signs, slow down. My wife and I just came that way last month. If you need any more information, ask away. Diesel is plentiful. Don't let your fuel gauge get less then half. No need for extra fuel cans or extra tires. Have a safe trip.