In our experience, the only CS's opened during the MNSSHP's are Cosmic Ray's (they also have a fun "Alien Dance Party" with Stitch, if you time the meal right), and Casey's. We were at one in Sept this year, and we wanted to get something to eat before the party started, and CHH was already closed up for the night. Kinda dissapointing, but CR is a good place to eat as well.