If you are going this August with the plan included, you need to make your ADR's (Advanced Dining Reservations) IMMEDIATELY or you will find no room at the restaurant. Being on the Dining Plan does not guarantee that there will be room at the restaurants if you have not made ADR's in advance.
Folks can begin making ADR's 180 days (6 months!!) in advance. The most popular restaurants book fully very early. They do NOT accept walk ups on the day of dining.
Take a look at the menus here and also at allearsnet.com and decide what appeals to your family. Than call Disney Dining and book your ADR's.
Hurry, so you won't be disappointed.