Cook breast side down.
Quoting: Robotanimal We discovered this secret on accident over 30 years ago. It's the only way my Brother will have Turkey now
Yes it stays moist and juicy. It changes the flavor for me, makes it seem a bit oily or fatty tasting.
Just stuff it with whatever you like and use a oven bag.
I never use stuffing though. It's a waste and gets disgusting inside the bird plus pulls moisture from the bird.
The way I do it is stuffed in layers from bottom to top.
Stuff 3 celery stalks bottom of cavity
About 1/2 stick butter slices get tossed on top of those.
Half a chopped onion with 2-3 crushed garlic cloves tossed back to front on top of that.
(Have thrown an apple quartered in before if cavity is large)
About 3 medium carrots.
Then another layer of celery stalks in the top to finish.
Seems like a waste because I toss all of those away but the flavors and moisture is perfect.
After stuffing turkey is rubbed with butter and sprinkled with parsley and whatever is your favorite herbs.
Have made other versions Cajun or Indian styles.
But the above is traditional Thanksgiving go to.