If one child is under the age of 3, you technically can fit in a standard room, but I think you will have to pay for a rollaway cot. But if you get that, then a crib won't fit. Your best bet would be to go with a junior suite. It has 2 rooms and sleeps 6. The Dolphin also offers several larger suites that would easily accomodate 6. The Swan has a studio suite that is a little larger than a standard room, but not as expensive as the Dolphin's junior suite.