I'm set for charcoal. This winter we kept a couple of gallon size paint cans rotating every time we stoked the fire in the stove. Most of it was oak, alder, walnut or whatever else fell off the trees in the yard, and will be put to use as brickettes for grilling come summer, but a couple cans I used willow and corn cobs. Tried them both with commercial saltpeter, and the willow worked much better. Still want to try cottonwood and rye straw. The willow was soft enough to light w/a match; no good for long lasting fires, but for a fire that only lasts a split-second, it was ok. Corncobs weren't quite so good, but still went bang. Present production levels should net about a quarter lb. by 2025 ... -if I don't get side-tracked.