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Bob
In my opinion you would be better off just using olive oil or butter on the skin along with some vegys, apples etc in the cavity. Add some salt and pepper to the cavity and sprinkle the skin also if you like. Use smoke for the first 1/2 of the cooking time and recoat the skin 1 or 2 times with the oil or butter while smoking. If you use a sugared rub the bird is going to get awfully dark
Good Luck!
McCormicks rotisserie seasoning and some course ground pepper work real well. Brush it down with olive oil first. A little Tony's seasoning works good too.
If you do brine, be careful with rubs that have salt in them.