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...
Bob's my daddy! Bob's my daddy! Bob's...My...DADDY!!!
Avatar by Northwest BBQ