You didn't mention if you wanted breakfast or lunch.
Our favorite thing to do on previous trips is to have an early morning at MK, then head over to Chef Mickey's at about 11am. We usually walk right in--the place is dead because breakfast is almost over. We then can really fill up on breakfast foods for lunch and enjoy the characters, then get back to MK just as everyone is heading to lunch!
That said, this time we got a PS. It will be interesting to see if it is really needed.