Remove all racks except lower rack inside the smoker, and preheat your smoker to 225 degrees for 1 hour prior to smoking with wood of choice (I use a combo of pecan wood and apple wood).
Once brined, discard brine, and rinse the turkey well with water to remove excess salt, and dry well with paper towels.
Tie legs with twine to keep the turkey’s shape, and help protect the breast from overcooking.
Mix together dry rub ingredients in a small bowl until well combined.
Rub the turkey liberally with melted butter, olive oil, or duck fat, and coat in dry rub.
Make a foil tent for the turkey breast by folding a triangle out of a large sheet of heavy duty foil, and covering the breast, tucking the foil under to keep it in place.
Stuff the turkey cavity with cut onion, rosemary sprigs, thyme sprigs, and cut lemon.
Once preheated, place the turkey on the lowest rack of the smoker (closest to heating element), and insert a digital wired probe thermometer into the thickest portion of the breast.
Smoke for 4-5 hours, adding wood once an hour, until the breast temperature reaches 155 degrees. (At this point, you can use the broil function of your smoker for 10 minutes for crispy skin with the foil tent removed, or remove the turkey to rest and tent with foil (the turkey will continue to residually cook after being removed from the smoker- which allows for a juicer turkey).
Allow the cooked turkey to rest for 30-45 minutes to allow the juices to redistribute, then carve and serve!