Well i live in utah and i too am forced to drive in the snow.
We havent had a real bad dump, at least nothing that has kept me off the roads for more than a night.
Im running some all season tires, and the only ballast i have is when my gas tank is full. Its gets a little squirly at times, but in my opinion it makes driving more fun!! :banana:
All jokes aside though, if you feel like you need more weight, add it. I would suggest putting a tarp underneath those sand bags just incase the beach wants out of the bag. I was almost to the point of sticking a bare 302 block in my trunk, but after i fried some piston rings last week, i dont see the point :hammer:
Good luck driving in the white stuff, and as long as you get where you need to go, get there sideways!!