I would use the buff, except that I wear it to bed if it gets real cold at night as a balaclava, and would rather not have food and grime on it if I have to wear it. I might try a disposable mechanic brawny paper towel instead as it is disposable, burnable, and lighter.
I'll try the canister stove without the tripod canister support.
I'm notorious for falling asleep with my headlamp on while reading, and running the batteries out on my E-lite. I always carry the one set of backup batteries for when this happens.