Grilling is cooking over hot coals. Barbecuing is cooking over indirect coals at low heat for a long time, usually with aromatic smoke added. It's the "crock pot" of charcoal cooking. I use an "El Cheapo Brinkman" smoker and get fantastic results. It's called "el Cheapo" because they only cost about $50. It will cook just as well as one costing thousands, it just won't impress your friends as much, if you're in to that sort of thing. The rub is from "How to Cook Meat" The cooking time includes 48 hours brining time.