I'm a 47 year old married father of 3, grandpa to 1. Retired from the US Army after 23 years, I spend my time working on an advanced degree, volunteering as a firefighter with Riverside County and of course, going to Disneyland!
CM friends of mine say they have seen it both crazy busy and a complete ghost town on Thanksgiving, no way to really judge. That being said, we've decided to do the same- ditch the cooking and go to the parks!
Apparently there are some bugs that need to get worked out. A disabled vet friend of mine was told today to "go sit on a bench while your family stands in line." Not sure that was a correct response from the CM.
Reservations are always good, but they do walk-ins too. The most I've waited is 20 minutes on a busy day. Whatever you are wearing in the park is okay for the restaurant, it is in the park after all. If it were outside in the general public I'd say jacket and tie/nice dress would be appropriate- but since it's in the park nobody expects that. Enjoy.