I doubt DCL's computers could handle all four ships at once. We LOVED our Fantasy Eastern last summer and want to do it again in 2014. One thing I would definately do earlier is book my room at WDW. Holy Moley! I dithered about adding days pre trip - first it was 2 nights then 4 and well we have the PAP's lets go to the water parks 6 nights then earlier flights were cheaper on SW and we ended up with 8 nights pre cruise. Yikes! I'm going to book the rooms ASAP. By the time I was done I had to split my stay because the Dolphin was fully booked - no rooms at all 1/2 the week and I couldn't get waterfront BC Conceirge the other half.