Liberty tree tavern has a charact meal during the party but its prob all booked(but check!) We eat as close to party time as we can back at POP ...so we can enjoy all the cool stuff th party offers instead of wasting our time at the party eating (do a chara meal another day)JMHO
Liberty Tree Tavern and Tony's Town Square both offer speical meals but they book way way in advance so you might not get into either. Call in the morning and see.
If not, you can always eat counter service in the park or at your hotel prior.