I've been tryign to do some research on this the last couple of days. And most of what I've found says what Nitrofly says except the temps I've been seeing are closer to 300, do a search for turkey on here there are a few threads that give general ideas.
My neighbor and MIL said that it would be easier to buy a turkey from the Honey baked Ham company(for $70, for just the bird) but that's no fun, and expensive.
One thing I've seen is that you need to get a turkey with no "solution added" usually between 8-12% although I've seen a few around 6%. If you brine a turkey with the X% solution added it might come out tough, because of having to much salt.