For those of you thinking about winter camping here's a great sled. We used them in while I was in the Army and always like the way they handled.
http://www.sportsmansguide.com/product/index/us-military-surplus-scow-sled?a=916748
http://www.sportsmansguide.com/product/index/us-military-surplus-scow-sled?a=916748