Wow, most people talk about sled dragging... I'm not sure too many of them are talking like straight up "riding down a snowy hill" sled dragging Not a bad idea, the biggest problem I could think of is that those sleds are designed to minimize friction (and go fast). But if you load anything down with enough weight you will either break it or get enough resistance

Incidentally, I think I'm going to build myself a sled this weekend. I was looking over plumbing bits last weekend. Between that and some scrap wood I'm guessing I could whip something pretty useful together.