Welcome to planDisney Ashley!
With 13 guests in your travel party, you can start your very own Mickey Mouse Club! I think you should get matching shirts for a perfect "We are at Disney World!" photo!
Booking a table for 13 will be challenging. I suggest
giving a call to a friendly Cast Member who will assist you. While a few restaurants will have tables large enough, the majority will probably need to separate you into 2 tables.
If you prefer to make your
dining reservations online, you will need to book 2 separate tables. When arriving for your reservation, let them know you are traveling together and they can try to put your tables near each other (simply a request, this cannot be guaranteed).
I noticed your travel dates are near the Thanksgiving holiday which is a very busy time at Walt Disney World. Whatever your plans will be to secure your dining, do it as soon as you hit your 60-day booking window as many locations will fill up very quickly.
For a very simple solution, perhaps try some wonderful Quick Service options that do not require a reservation and you will all sit together! Try your food court area at your resort hotel. When at the parks, there are some fabulous options such as the
Regal Eagle Smokehouse in EPCOT,
ABC Commissary in Disney's Hollywood Studios, or
Columbia Harbour House in the Magic Kingdom. All have large seating areas perfect for you and your travel pals.
Enjoy your vacation at Walt Disney World! Sending magical wishes and pixie dust!
Cathy