I've been think about this a lot as well. The most likely solution I'd consider is a "firewood" producing building and then balancing towards that. As you saw in the twitch stream this morning though, it is possible to stockpile sticks, I survived 3 winters. One feature that is coming soon is the ability to directly prioritize certain resource points, so you will be able to prioritize stick collection from trees directly. This should solve the problem anyway, but if not, then we'll look at the production chain.