This is just a matter of taste and moisture.... If you brine an enhance bird I don't see the benefit or difference, if you brine a cheap grocer bird its probably a good idea to brine as you don't know what they will taste like or if there will be any flavor, if you brine a well raised and fed bird you will likely have a nice moist bird with some encouraged flavor but with a bit of a rubbery skin due to the moisture and holding temp in a smoker if you don't air dry w/salt for awhile, if you don't you likely will have a richer tasting bird but a bit drier white meat if you don't add butter or the like to the breasts during and before cooking, so all in all you have a choice....but if your not concerned with presentation but rather would like a far faster and more importantly improved skin coverage you could spatch-cock the bird, lube it up and smoke it hot and fast..... cooks even, tastes great and you get more crispy skin....