If you are looking at a week on either side of Easter, the price could increase by $2000 or more for a room with 4 people. You can look at cruisefish.net to see how much rooms have increased already for the spring break 2014 dates.
With DCL the prices fluctuate upward astronomically generally. Of course it depends on the sail date, and whether it is a super popular date. DCL may come out with what's called *GT Rates after the PIF date to fill the ship. Often they are good rates but with lots of restrictions.
Do you have a specific date in mind? Perhaps we could help more if you supply your date.
I see you want to sail out of MIA in April, so that would be the Wonder vessel it appears, if I'm reading it right.
April out of MIA on the Wonder in 2015 offers 4 sailings with two different itineraries.
2, 5 night western sailings. Cozumel and Castaway Cay.
And 2, 5 night western sailings. Grand Cayman and Castaway Cay.
I will say IMO this vessel should maintain the lowest prices across the fleet.
HTH
ETA; Corrected the proper year itineraries. Duh ...
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