Are you planning on eating all of your meals with all 20+ people, or will you be splitting up at times? The character meals are good for large groups, but I don't know if I'd call them "reasonably priced." The Rainforest Cafe & Ralph Brennan's Jazz Kitchen are good in DTD, but they are also somewhat pricey, although less per person than a character meal, depending on what you order. There's a McDonald's on Harbor, right outside the park, for quicker, inexpensive meals. There are also several other restaurants on Harbor, in walking distance, Dennys, IHop, Mimi's, Tony Roma's, etc..., but they are priced at "resort" prices. It is not a bad value compared to the parks, but just keep in mind that the prices may not be what you're used to at home for the same restaurants. There's also Pizza Port in DL or Pizza Oow Mow Mow in DCA, which is a counter service, but you can order whole pizza's and the salad's & pasta's are large.