Smoked turkey is a second to bacon in the number 1 thing requested off the smoker from family and friends.
I haven't purchased a whole turkey in years, maybe 8 or so. I purchase turkey legs by the case (usually 15 in a case ~2 lbs each) then the Honeysuckle frozen turkey breast. ~12 lbs, I'll cook two or more depending on # of guests.)
Brine, I go crazy, sometimes up to a week in the liquid. Pink Salt, salt, pepper, cumin, garlic powder, paprika, brown sugar, liquid smoke, molasses. Items in bold seem to be the key.
I'll start at 225, legs on first. As indicated the dark meat can take a higher IT, I'll go up to 180. If I don't like the skin, I'll even reverse sear on the gasser to crisp up at the end. I spray with PAM at the onset. Often cook up to 7 hours.
At the 2 or 3 hour mark, I'll add the breasts, same PAM, but pull with a much lower IT. 155 and let it come up to 160 or so. For so many years I thought the white meat needed 180, and that is some dry turkey! Now I know better.
While it takes a bit of brine prep, this is an incredibly easy way to knock it out of the park every time with turkey. I suppose the main thought here is breast and legs are completely different meats for the cook.
DK