There is no one (1) answer to your questions, the options are too numerous.
Whole or spatchcocked?
Brined or not?
Butter under the skin?
Baste?
Easiest, quickest and best results in my opinion.
Spatchcock
Inject with a tasty marinade and rub on the entire bird
Smoke over hickory at a minimum of 275°, preferably higher 350°-375°
It's done when you've safe IT.