I cannot really say what the best vehicle is. But I see a lot of people with 4x4's thinking because they have a 4x4 they can do 50mph+ on a road with snow. Yeah it will help, but you have to stay in reason and drive smart.
Personally, I would say something like a Hummer. The original, not the 2nd or 3rd, but that big hunky box of a truck that is made for the off road and gets maybe 8mpg. Why you ask? Well, they are heavy, wide tire base, made for off road, and most important, slow. You are doing going fast at all.