If you are cooking it for dinner in your smoker, then get the temp of your smoker up where you would set your oven to roast the Turkey, or as high as you can get it my MES only goes to 275, and you should get your bird up through the safe zone in time, and of course you probably know not to stuff the bird, I haven't done full turkeys in my MES I have only done breasts, but a good brining and some good TBS and it makes for a spectacular dinner
good luck