I leave it's original stuffing in there... Really there is no need to waste all those internal organs, and besides this is the best way to keep your bird fresh until after it starts cooking.
It's not safe to stuff a bird. We do make dressing but don't actually put it inside the turkey. If I have to do TG I don't roast a turkey, I just buy a turkey breast or a small smoked turkey. My sister buys a whole turkey when she does it.