It was a pretty long time ago–1998 or 1999. After a few days in San Juan (attending a conference) we planned to take the ferry over to Vieques, but it was delayed enough that we were probably going to miss the Bioluminescent Bay trip we had booked, so with the help of a nice person, we found a ride to the airport and then flew over. It wasn’t all that expensive–should have just booked a flight in the first place. The Bay was very cool–I would love to go back and see it again. If the moon is full, there is too much light to be able to see the Bioluminescence well, so we were very lucky with the timing of the trip.