Best advice a Yankee gave me there: weigh down the bed, right over the rear axle. After that, always had 8 50 lb. bags of sand over the rear axle. Quit sliding and rode better even in 2X4. Night and day difference!
Used that trick when we lived in Minnesota and had to deal with road conditions all winter , started as early as October - had snow on occasion up until May and lakes were still somewhat frozen even then :):):)
Likewise, a 4WD vehicle is only two-wheel-drive, one front and one rear. Many trucks up here have limited slip differentials in the rear so they essentially have three-wheel-drive.
Many 4X4 competition vehicles have "lockers" or "spools" which defeat or outright eliminate the differential, since they are trying to get maximum power to the ground, and are spinning much of the time anyway.
(See: "CORE" and "Forumla 4X4 Hillclimb" on youtube)
In one of his fictions Garrison Keillor mentioned summer in Minnesota lasting one day -- the Fourth of July.
So a 2X4 truck with snow tires and extra bags of sand over the rear axle will work ok in snow country...?