if you want to see the bioluminescent bay at Fajardo (near San Juan) as it SHOULD be, you need to book with Adventure PR! Our guide, Arturo, was very friendly (in a relaxed, open kind of way-not like "I desperately need your money"), knowledgeable and flexible. It was just us 4 family plus him, and he was very focused on making our Rainforest-Biobay adventure unforgettable and fun for us.
We hope we didn't do any harm to the dinoflagellates by getting in the water with them, but it is DEFINITELY the way to experience the bioluminescence! We were so happy that we weren't in a big, noisy group of obnoxious "turistas" in kayaks. We could see them and hear them, but they were far enough away not to bother us.
Both at El Yunque and the Biobay, Arturo took us to great spots where there were very few other people, but the natural experience was fantastic! If we are ever able to return to Puerto Rico, I will definitely book another trip with Adventure PR. They are not the cheapest, or the most luxurious, company that runs tours to El Yunque and the Fajardo Biobay, but they provided a wonderful experience at an excellent value! It was like having a good friend who is a local and doesn't mind showing you the best of outdoor Puerto Rico (plus some awesome roadside food)!
Last but not least, booking with Cindy was terrific! She was very helpful and easy to work with, and won't steer you wrong. I was skeptical about booking a Biobay tour during an almost full moon, but she said our guide would make sure we still had a great experience, and she was right! Plus, the cost of our tour included door-to-door transportation from our hotel.