Everyones method is different, some put stock in the bottom of the tray and wrap the turkey in foil, some slow cook it overnight (I found this to be dry when I did it).
I would put it on 180 degree heat with foil over it for the recommended time, then for the last 20-30 minutes, take of the foil and knock the temp up to 200,.
Some people rub butter over the bird , some just baste it every hour with the juices, I do the latter.
Rashers of streaky bacon is popular to put over the top (breast) of the bird, I found a long cooking period burns and makes the bacon hard and brittle, but hey some like their bacon like this.
I put the stuffing under the skin of the breast, NEVER in the carcass I dont know if this keeps the bird moist but I've not had a dry bird yet
Jamie O has some good tips on how to cook a turkey!
www.jamieoliver.com/recipes/christmas/
or bbc food
www.bbc.co.uk/food/recipes/database/theclassicroastturke_65538.shtml