I smoked a turkey breast last year that was awesome.

BIG SECRET....everyone should know. Have a pan of water under the turkey. I use a gas grill and put the bird over the side THAT IS NOT LIT. The pan of water under the turkey will cause steam shooting through the turkey making itVERY moist. My 8 lb breast took 3 1/2 hours. I also used oak chips soaked in water. Use a meat thermommeter. A whole bird should be 180 degrees and a breast 170 degrees.I mounted a nice temperature guage on my grill. Walmart... Keep temp around 325-350

Best turkey I've eatten