Hurricane season is from July to end of November. I think I would go with the Mexican Riveria trip. I personally won't book a cruise in the Carribbean during Sept or Oct. because that is the two months that is supposed to have more hurricanes. According to the Wall Street Journal last week, 2002 only had a few hurricanes but they are predicting alot more for the year 2003.
It is all in what you want to take a chance with.