Never had breakfast there. Loooooove dinner, but never tried breakfast. I'm just playing Devil's Advocate, though. I don't know how long it takes to get to DCL's home port, how long it will take to check in and get to your room, etc. Are you sure you want to indulge in an all-you-care-to-eat buffet before traveling like that?
If so, go with God and enjoy. Just pointing it out in case it's the sort of thing you would normally think of but didn't this time.