Great choices for where you will eat so far!!
You will need reservations for Blue Bayou. They require them (though there have been more reports recently of people being able to do last-minute walk-ups to get seated, but I wouldn't chance it).
It is suggested that you get reservations for the character meals like Goofy's and Minnie's, because those are very popular and if you don't have them, you
may be waiting a while to be seated.
I absolutely encourage you to make reservations for Rainforest Cafe. That place is very, very popular (great menu, though, and absolutely fantastic atmosphere inside) and you could be waiting a very long time to be seated (like we did) without a reservation. We waited about an hour one time.
Other good sit-down places are:
Carnation Cafe in DL - that has a great location alongside Main Street and is wonderful for people watching. Very limited seating here, though, so make reservations. You can eat at Carnation for breakfast, lunch, dinner or dessert only. (Try the yummy Matterhorn Sundae, along with the apple pie a la mode w/ whipped cream and strawberries.)
Wine Country Trattoria in DCA - huge salads, decent wine selection, good meatball sandwiches, blood orange sorbet. Tables always seem to be available when we go.
Storytellers Cafe in the GCH (for lunch or dinner) - nice cozy, woodsy ambiance and good food. The spaghetti and garlic bread were extermely flavorful. You could probably get away with not making a reservation here, but always better to err on the side of caution.
Naples Ristorante in DTD - good portions. Even the smallest pizza is big enough for 2 or 3 people. Nice quiet outdoor seating area overlooking DTD.
ESPN Zone in DTD - good food, good portion sizes, good service;
very noisy and busy, though. If you choose to eat here, definitely make a reservation.
I have not eaten at these places, but other folks on the DIS love them: Ariel's Grotto in DCA (a Princess meal), Cafe Orleans in DL, Steakhouse 55 in the DLH, Napa Rose in the GCH and the PCH Grill in the PPH (home of the "Kitchen Sink" sundae - which is enormous, to put it mildly). Folks also rave about Ralph Brennan's Jazz Kitchen in DTD.