Smoking a turkey is really very simple, however most people tend to over think the process making something easy, more difficult.
You can start with our Brethren Ultimate Turkey Thread.
http://www.bbq-brethren.com/forum/showthread.php?t=120494 Lots of information here to answer all your questions.
Here is a guide to smoking the turkey by PatiDaddio, simple yet awesome.
http://www.bbq-brethren.com/forum/showpost.php?p=1450009&postcount=1
Turkey, like most poultry has a lighter more delicate flavor. One does not want to lose the lighter flavor of the meat with an overpowering smoke flavor. The difference between a great turkey and a good turkey may be the type of wood you are using, the amount of wood, or possibly the temperature you are cooking at. Because of this careful consideration should be given to the smoking temperature as well as the type and amount of wood being used.
You will get many recommendations, but I prefer to smoke my turkeys at 325 degrees and I prefer apple wood chunks, or an apple/cherry wood chunk mixture. But you will have to find what works for you and your tastes.
I also feel one should really consider the benefit of using a brine, not only for moisture, but for imparting great flavors as well. If you plan to brine, make sure you do not select an "Enhanced" turkey as these birds have already been brined by the processor. If the bird is "Enhanced" and you brine it, you may end up with a slightly over-salty flavored turkey, and it may also effect the texture of the meat.
I prefer the flavors imparted by Patio Daddio's Ultimate Thanksgiving Brine.... The flavor is truly awesome!!!!
http://www.bbq-brethren.com/forum/showpost.php?p=1087814&postcount=1
Here is a guide to smoking the turkey by the same person.
http://www.bbq-brethren.com/forum/showpost.php?p=1450009&postcount=1
There is also a good article in Smoke Signals Magazine starting on page 26...
http://issue13.smokesignalsmagazine.com/
and of course the Brethren Unofficial Turkey Thread....
http://www.bbq-brethren.com/forum/showthread.php?t=120494
and lastly Wampus Smokes a Turkey.....This mirrors the article in Smoke Signals above.
http://www.bbq-brethren.com/forum/showthread.php?t=176618
Good luck and keep us posted.