read reply #6, it how you start the smoker that counts.
Bob, haven't you been told "size doesn't matter, its how you use it that counts", that includes smokers.
My smoker is 6 1/2" high with a 4" dia barrel, if lit properly will run all day, keep it fuelled to keep the smoke cool.
Fuel, anything, hessian, eucalyptus leaves, pine needles, dry cow manure, hay but burns too quick. Best combo is pine needles and cow manure. The cow manure smoulders slowly.