I'm with Bannerstone. Easily the bulkiest thing I carry in the cold months is clothes.
I have a 40* incubator and a 0* model. I'd say the 0* is twice the pack size of the 40*. I hate sleeping with a pad under my feet so it's worth the extra weight for me.
Last edited by lymphocytosis; 09-14-2012 at 12:06..