Tri Tip can be smoked low and slow or tri tip can be grilled hot and fast.
Either way turns out great. Experiment and chose which method that you prefer. I personally prefer "Santa Maria" style grilled---but others have differing opinions.
We cooked 17 cases of tri-tip today---approx 400 tri-tips and used 2 Santa Maria Style open grills using oak wood and spices from "The Rub Company. They turned out awesome just like always. Tri-tip is a forgiving cut of meat---it is hard to ruin a tri-tip----however it can be done.