Your best bet is to get online at 6AM 60 days out from your check-in date. With a very quick calc, that's probably 10/18. You should not have any issue making a reservation for 7 people. You should lay out the desired dates/times you want. Being Christmas week, it's probably going to be packed. If you wait to call guest services or DVC Member Services, you're going to miss out on 2-3 hours of other people making online reservations - and things can go quickly! They only open their phones at 8 or 9AM.
You'll have one advantage - you can make all your reservations 60 days out, for your entire stay. You'll have much better chances of getting some of the reservations later in the stay (63, 65, 67 days out) because less people get actually make reservations for those days. If some of the restaurants you've listed above are reservations you want early in your trip. I'd recommend 2 things - go after the earliest, most important reservations first. But also have a backup plan if you cannot get them early in your trip. That backup plan might be an alternate restaurant, and/or doing the desired restaurant later in the trip (if you can).
I'm not sure how much this little bit of info might help. But lay out what you want in the way of ADRs, prioritize them, and be ready to jump online to make the reservations. If you're not as familiar with the dining reservation system, go out soon and just work through the process for restaurants on pretend dates - just don't actually make the reservation! It'll make you more comfortable when you do it for real. Good luck - have a great time!
