There is ALMOST someplace to eat round the clock. In the main dining rooms (3) you are assigned either 1st or 2nd seating so you are scheduled for dinner at 6 or 8. Buffett is open for breakfast, lunch and dinner. Other quick serve locations are open on the pool deck with sandwiches, burgers, dogs, pizza, and ice cream.
Adult dining is Palo (northern Italian) or Remy (French) on Dream/Fantasy and Palo on Wonder/Magic. $25 pp upcharge at Palo and $75 pp at Remy.
Sea days are full of things to do, most of which are free including tours, games and movies and shows. Others like wine tastings have a small charge.
Here is link to a cruise site that has copies of Navigators from recent cruises. You will get these every day. Use them. Platinum Castaway Club Disney Cruise Line Information