Since winter camping requires heavier everything one way to save on fuel weight IF you're going to be in a forested area constantly ia a wood burning stove.
My 1st suggestion is a Caldera Cone Tri Ti wood. alky. ESBIT stove.
It takes large sticks of wood so does not need to be fed constantly as do other wood burners. I packs flat or rolled around a bottle. It's light and VERY efficient if made to fit your pot on a custom order or a standard range of pots available form the company. The CC Tri Ti has a clever interior inverted cone & grate system for improved fuel combustion.
2nd is the efficient Canadian made Bushbuddy. It's the most efficient stove at combustion but much less efficient than the CC Tri Ti at using that heat. Plus it needs to be fed small fuel sticks constantly. You can't step away from it.
3rd is the Zip Stove using a battery powered fan. Been around for decades and works as long as the batteries and motor does.
4th are various forms of "Hobo Stoves".