Hi Charlie,
Happy New Year. My first recommendation would be to brine it regardless of how you intend to cook it.
Couple of questions?
You cut it through the breastbone right? In other words each half has a leg, breast,thigh etc. right?
Next question have you given any thought to your cook temp? If you're going to be doing a smoke / roast at 300* plus you've pretty much got to do breast up IMHO.
Higher cook temp gives you a better chance of crispy skin.
I'll give you another completely off the wall suggestion. You might want to consider boning it breast, dark meat and all. Then, trussing it in butcher's string and putting a nice rub on it. You get something I call a turkey tenderloin. People like it. I've had it run the gamut from turkey pastrami to sweet tukey log depending on the rub.
Hope this helps.
On edit: Charlie, My post crossed w/Doug D's. I've learned to follow Doug's advice he hasn't sent me down a blind path yet.