The above comments is why I always cook my whole turkeys on my Performer kettle. I cook it indirect in the middle of the grill with coals on either side along with soaked wood chips. When I first got a Weber kettle probably 25 years ago, we also got a Weber grilling book and the recipe and process were in that book. The turkey that Thanksgiving was the best and everyone raved about it. The skin was golden and crisp and the meat was tender and juicy. Since then, I now brine my turkey overnight before using the same technique and it is even better. The one year that I smoked my turkey on the WSM, it was ok but not as good as my normal birds. The high heat method is to me the best way to do a turkey. I will try to find the recipe on Weber's site and update this post.
This is the link to the basic process on the Weber site.
While I love smoking most meats, for me poultry is better with high heat and this method works for me.