Having lived in snow country for a long time, I believe there is no worse vehicle in the snow then a 2WD truck (or RWD van). Because there's no weight over the drive wheels. The trucks would probably work much better if carrying a truck camper or towing a 5th wheel.
I haven't paid too much attention, but maybe those Alaska troopers are driving front wheel drive (FWD) cars these days. A FWD vehicle with good tires does extremely well in snow. In fact, when I had FWD cars, I used to put 2 real snow tires on a set of extra rims and switch them out every December, then switch back about 1 March. I could go just about anywhere in the snow. But even without snow tires, a FWD car does surprisingly well in snow or other slippery conditions, because of all the engine and transaxle weight right over the drive wheels.