There could be, but not too often and the deals are really no better. In fact, I highly recommend NOT booking a cruise and WDW vacation together. Book them separately. I booked a one night stay at a WDW resort through
DCL and it's been such a headache to deal with. Neither DCL or WDW has real access to my reservation. DCL says I can't make requests through them because they can't access WDW reservations. WDW says they can't see the reservation because it's done through DCL. All I wanted was to put in a request for a bed rail! Ugh. It's a pain. Don't do it. Plus, DCL rarely run promos, unlike WDW and if a WDW promo comes up, you can't apply it through DCL. Book it separately and have control over BOTH reservations.