Welcome to the site.
I recently smoked my first turkey about a week ago, and it turned out fantastic, best turkey I ever ate. I did not brine the turkey, all I did was inject it with some injection I found at the local grocery. The stuff was called "Cajun Injector Creole Butter". It was about a pint jar, and I used the whole thing on the turkey. I did about a 15 lb bird.
As soon as I got done injecting I threw the bird on my smoker at about 300-350, and smoked it for about 3.5-4 hours. Just keep an eye on the color of your bird. If it gets to the color you want and you aren't to temp yet, just tent the bird with foil so the skin doesn't darken any more. Pull the bird at 165 IT, and let it rest for about 30 mins. Then its time to eat.
My wife told me I'm in charge of Thanksgiving Turkey from now on, so you know it had to be good.