We hit RFC at AK every time we visit & love it for Breakfast (Kids adore Tonga Toast... an ultra sweet version of French Toast) and Lunch -- their Burgers are to DIE for after all those counter service meals.
I feel RFC gives a better value for your money than many of the other places. However, with so many kids, I'd get all the adults on the same page before going and agree to watch the little extras (novelty cups etc) as they add up the bill FAST. It's cheaper to promise the kids a small toy form the gift shop & it's a lot more portable than the giant cups the kiddos insist on keeping and letting you deal with. (The prices in the gift shop are very reasonable for the Disney area too.)
Which RFC are you booked at? We tried DTD once and didn't care for the service, cold food or the wait to get in. Have been to AK one no less than 5 times and never been disappointed (although if walking in drenched from the rain you'll freeze from the AC)