I am sure you know but have your antifreeze and fluids checked. I keep antifreeze to -40 at a minimum. I run synthetic oil in winter for easier starts. Ensure your battery and charging system is in top shape, I would have it checked to be sure, cheap insurance. I had a friend driving a few years ago and he was stuck for several days due to parking overnight and not being able to start the next day. Had to get tow to heated shop and thaw it out. I would also carry more gas than you think you need and fill up at every opportunity. It is sometimes far between open stations in the winter. Many also seem to close early. I usually try and run my car at least 15 minutes or so every 3 or 4 hours if I am overnighting in the far north such as Fairbanks. More often or longer if it is really cold. Nothing to be overly concerned with but you should be prepared to keep yourself warm if you have a break down. But you probably know that. In South Central AK I do not have a garage and simply start my vehicle and drive to work each day. Not a big deal if you have prepared your vehicle. I have not driven the Alcan in the winter but others have told me the same thing you were told here. You got some good advice.