I didn't use a bag just used my turkey roasting pan and cooked as normal (covered low & slow for 2-2 1/2 hours then uncovered for about an hour or so (20 lb. bird) until the juices were clear.
I don't have a smoker either. I use my grill as a smoker. Google search how to do it. SOOOOOO easy and the results AHHHHMAZING!
You're going to be a happy girl because smoked turkey is outta bounds legit! Soooo good! I usually smoke mine for 5 hours then pop in a LOW oven (250) covered for an hour. Then let rest a bit (20 minutes) then carve. MAN O MAN is that a juicy bird. The only down side is you cant make gravy unless you want it to be all smoky tasting. But the meat is so juicy it really doesn't need anything. But if you're doing mashed taters & stuffing you're gonna want gravy. I usually cook several turkeys through out the month (I've already done 4 so far this month
) and then save the drippings to use to make gravy for when I smoke a turkey.