I think you may be over reacting a bit. the odds of a hurricane or major tropical storm striking one particular island during a given week or so are relatively small. You can research the historical frequency of hurricanes that have affected any particular island at
www.stormcarib.com - use the "Climatology" link on the top right of the home page then select "Hits & Misses", scroll down and click on Grenada (or whatever island you want to research). You'll be directed to a chart showing the dates of every major storm to affect that island since 1851. Compare the results to week you are planning to travel and you'll see how many (or how few) storms there actually have been during that period.
