Most of the islands are voting for the resumption of whaling, however this is nothing new. Even if most of the islands probably won't ever resume whaling, it is unfortunate that they vote in favour of it. Having said that, the IWC ban on whaling is, strictly speaking, illegal because of the way the moratorium was supposed to be lifted after 10 years (long story behind that one!). While I don't advocate a return to whaling, the talk of boycotting Caribbean island tourism on this issues seems pointless (not accusing anyone on the forum of this) and counterproductive.
Truth is most the islands are poor continued investment from the Japanese is much needed. Generally the pro-whaling stance stems from this type of foreign aid. It is an issue that won't be resolved soon for sure.
There are some great Whale Watching operators in the region fighting this thing tooth and nail, believe me! (though no government would ever admit to being bought out!)
My 2 cents on the whaling thing... I do hope you have a good trip, find some good diving - you should on Barbados and Dominica (though Dominica topside it great too).