I'm not sure what the fuss is about. I think the trip would be much worse in the summer with all the gravel. I live in Wasilla, Ak and work in Prudhoe Bay. Up north past Fairbanks, all the roads are gravel in the summer and snow/ice in the winter. Our roads on the slope are much more friendly in the winter. I wouldn't worry about the windshield during that time of year, but the weather will likely be very cold to a Californian. Plus, your BMW windshield is pretty touch compared to many others. Its about 250 miles from Fairbanks to Coldfoot, where you can get gas, and another 250 to Deadhorse where you can get gas as well. I wouldn't carry spare fuel, but a few gallons may not hurt if you're worried. Pay close attention to the weather before you leave as the storms in the pass and north of the Brooks Range commonly result in white out conditions with blowing snow (like you couldn't imagine). I would strongly recommend renting a satellite phone from "The Surveyers Exchange" (
Surveyors Exchange) in Anchorage. It is super valuable to have while you're remote as there is very llimited cell service all over Alaska (pretty slim north of Fairbanks). I think they will even mail it to you if you need it.
For tires in the winter, I can highly recommend Blizzak DM-V1. I run the 255/55/18's all winter long and they work great.
Just watch Ice Road Truckers and figure about 80% of it is bull and over exaggerated. Just realize the weather can and will bite you in the butt if you aren't prepared.
Actually....exactly one mile past fairbanks your car will break down and you will freeze to death.