Welcome back, Shea-Le! That day full of adventures in and around the Walt Disney World resort is going to be such a great part of your cruise!
If you plan on spending the entire day in the parks, I highly recommend making Advanced Dining Reservations as soon as possible as many of the time slots fill quickly. Have a look around the
Dining page on Walt Disney World's website. There you can choose the park or resort, date and time of day during which you'd like to dine, and you will be able to see what is available.
Dining onboard the ship will still take place as usual, but since you'll be out and about in the parks all day, you will most likely miss the regular meal times back on the ship and want to plan meals in the parks. There are some really fun character dining opportunities in all of the parks as well as a few of the resorts, so those are fun to check out! Your best bet is to plan a meal in the park that you plan to be in during that time of day. You'll maximize your park time by eating nearby instead of having to hike over to another park or resort in the middle of your action packed day. But if there is a restaurant where you'd really like to eat and you can only get reservations at a certain time, plan your park hopping around that reservation. Either way, you'll have great meals and a lot of fun exploring the attractions.
Have fun as you continue to plan, Shea-Le!