gmag i can tell you for the most part water in a smoker has squat to do with moisture but rather temp control. Some folks are in hot climates and like water to hold down the temps on hot days. Your neck of the woods don't worry about water but rather vent control. Hope that helps.
Mini,Jimmy(Jumbo Mini),BP UDS, Kettle, Potbelly Stove Smoker Smoke house, IQ,Guru etc..Keith