I've done a cook on my kettle using nothing but wood chunks. Started a chimney of chunks, let those warm the kettle up while warming some more chunks on the cool side of the grate and added them before cooking. Of course, I was doing a high temp (About 300~325) and it was an experiment that actually worked, but using lump (Which is, after all, wood) is far cheaper for me...
Guerry >^..^< Pit Beeatch for Team Munchkin
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"If more people would just open their minds, more people would learn things." Wampus