I smoke a turkey every Thanksgiving and a few times more than that. If the bird is more than 14 lbs or so, you are taking great risk going low and slow. The interior of the bird will stay in the danger zone too long. I no longer go low temp for turkey, instead I smoke @ 300. I brine!!!!

Season then stuff the cavities with aromatic veggies. Compound butter under the skin (butter + rub). A little oil and rub on the outside. Place on a rack in a pan. tightly wrap the drumsticks/thigh and tent the bird with foil when the bird shows some color (and has taken as much smoke as it's going to). Turkey's delicate flavor doesn't need a tremendous amount of smoke. Should take ~15-25 min/lb depending on conditions and how often you check on it. I'm also doing a brisket alongside the bird. Since I'm smoking the bird on LI to bring to my mom's place in NJ, I pull the bird when it reaches ~155 in the breast and put it directly in a cooler. It finishes cooking while we drive and is done and hot when we arrive.