Answer:
Generally no, I don't cover the turkey when I cook it. There is a cooking technique that involves covering the breasts for a certain amount of time to keep them from overcooking while you wait for the dark meat to fully cook, but I don't do that. Dark, crisp skin on the turkey is a priority for most people.
Instead, I like to butterfly the turkey, removing the backbone, then boning the breasts (essentially you are removing the entire ribcage), and laying the turkey out flat in the pan, with the breasts on the inside and the legs on the outside. It cooks a lot faster, a LOT faster, you cut hours down on the cooking time, it cooks more evenly, you don't have to cover the white meat, its easier to handle and store, its just much more convenient.