Hubby gave me the go ahead to book 4 Night for next February directly following WDW/US vacation. We cruised the 7 Night Magic 2/02. Could someone give me the basic differences between the two? Did I read there is no formal night on 4 Night? Does dinner rotation matter? What are age groups for kids club? DS will be 7. DD & Pal will be 17 & 16. Thanks!