I don't shoot with Nikon but "favorite" lens really comes down to favorite for the situation.
But if I were to add to your lenses specifically for a Disney trip, I'd consider 3 types:
-Ultra wide, like the Tokina 11-16. Can create some very interesting Disney perspective.
-A 30-35mm fast prime, IF you want to shoot dark rides.
-70-300 zoom, if you want to shoot the Animal Kingdom safari.