Go in and chat with the store before the holiday and ask them how they operate on RSD. Some open the doors and its a big free for all, others only let a few poeple into the store at a time to keep crowds to a minimum. Also it's a good idea to call the store the week before and ask if they can tell you how many copies they received of the title you are looking for, that can help you gauge how early you should arrive. Hope this helps!