For me wood pieces have been to inconsistent, even when I would wrap them or try and soak them. I have switched over to good pellets. I weigh them out and wrap in foil with 1 or two small slits, and will never go back. I get perfect and consistent smoke every time.
Just smoked 2 whole chickens last night for pulled chicken sandmiches...mmmmmmmmmmmm.
I always have smoke coming out at 20-25minute mark and the smoke is pretty much nonstop til the cooking is done. 4 ozs of hickory pellets, 2.5hrs and chickens were perfect.