Season: Pat the chicken dry with a paper towel. Rub all over with oil and seasoning. If you have time, let this rest in the fridge overnight. If not, that's okay.
Charcoal or Gas Grill: Heat the grill to 275F degrees with an indirect heat zone. See above for setup and wood recommendations.
Pellet Grill: If you have a pellet grill, heat it to 325F degrees.
Smoke: Place the chicken on the grill skin side up. Smoke for 1 hour.
Spray: After the first hour, spray it with duck fat spray. This helps crisp up the skin.
Finish: Continue smoking for another 30 minutes or until the internal temperature reaches 195-200F degrees.
Optional Sauce: If you want to add sauce, brush it on during the last 15 minutes.
Notes
If you don't have duck fat spray, you can also use cooking oil spray.