Lots of great stuff on the Wonder – the ship décor, the crew, the Disney characters. But I am going to focus on the gluten-free food aspect. My daughter (8 years old) has celiac disease so it was important for her to get the correct food. She is also vegetarian. We notified Special Needs @ Disney before travelling, and confirmed with the Dining Manager on boarding. You can do this at the same venue where they take requests for dining-time changes, and Palo reservations. In our case it was at the Studio Sea.
On boarding, the chefs at the buffet in the Parrot Cay dining room were extremely helpful and reassuring. They assembled my daughter’s salad & veggies in the kitchen, to prevent cross contamination from the buffet.
From then on, she ordered all meals in advance and we had to eat in the main dining rooms at all mealtimes. We were given the next days dinner menu each night to choose from. However, we weren’t given menus for breakfast and lunch, so we just had to think of things to order. Note that there are no gluten-free breakfast cereals on board, so you will have to bring those with you if you prefer them.