Extended time in the cold means an extended shelter. I use the smallest grand Bruks hatchet, Wyoming saw, and knife with heavy 6 inch blade. Hatchet is a pound, saw is pound, and knive is .75 pounds. With them I can build one hell of a shelter and gather plenty of fire wood. The worst the weather the stronger the shelter will need to be. In general these three cover about any need you have unless building a cabin.
