With kids that young, if your wife also wants a break why don't you try one of the French summer camp-style places? The French have always excelled at this sort of thing. They take looking after kids of all ages and entertaining them to a high level. Perhaps Turks & Caicos or one of the overtly French islands in the NE Caribbean, such as Martinique. Just a thought.
Certainly the last thing you should be considering is island-hopping. It'll be murder (or you'll be tempted!).
Certainly the last thing you should be considering is island-hopping. It'll be murder (or you'll be tempted!).