Tires are key.

My wife's Ford Explorer was plowing 6" of snow in my street with the front bumper but still didn't have any trouble cause of the Blizzak tires. They're worth it. The all seasons never could cut it in the snow.

My Ram SUCKS in the snow with standard OEM "All-terrains". But put some Hankook snows on it and it's so much easier in the snow.