Hi Lisa,
This is a great question. With the popularity of the "free dining" promotion, table service locations will book up quickly. My suggestion is to search availability via
Dining on disneyworld.com to see how your dates are looking. Also keep in mind dining reservations sometimes come available as your travel dates approach. Guests' itineraries will change and with many dining locations requiring a credit card guarantee, availability might open up.
When you use the above search, simply place your travel date in the date field, select "dinner," (or breakfast/lunch if you prefer) and finally your party size. The site will provide you all available options throughout Walt Disney World Resort. You can then filter the selections by location, if needed.
Please let me know if you have any other questions, Lisa. I'm happy to help.
Sherri