" But for winter, I install a pair of good BFG Commercial TA Traction tires (snow tires, really), and the difference is night and day."
THAT, plus some weight in the back (I carry six 70 pound sandbags), and you are good to go all winter long. I very rarely put the truck or the Jeep into four wheel drive. I simply don't NEED to!
IMO, it is ridiculous to use summer or "all season" (a joke at best, simply dangerous at worst) on snow and ice!
I run snow tires all year round on the truck and the Jeep.