I take a tent and sleeping bag along when I drive through areas of potential high snowfall. I had 2 trips last winter that I made ok but was sure glad I was carrying some backup shelter and warmth!
Don't forget a shovel, tire chains and some road flares are good to have for marking or firestarting if necessary.
_________________________
No, I am not Bear Grylls, but I stayed at a Holiday Inn Express last night and Bear was there too!