Hell when my coals get low I just turn up the gas. :-) Now on the serious side the tendency to go with logs instead of splits or wheels is very tempting. If anything a good coal bed and smaller spilts of wood is the way to go. Even in my gas smoker I don't fill the wood box, by adding small amounts off wood at a time I manage just a trace of smoke. Thin Blue dude.
have to admit when the meat is wrapped in foil and not taking any smoke i will add to the wood box for the aroma and to piss off the neighbors. Makes them hungry...