A word of warning. Do not book this tour unless you have a rental car. I booked this tour and looked at the distance on a map, and thought that an Uber would do the trick. However, it is over an hour drive to the tent, which is doable with Uber, but there is NO Uber back. Uber would not let me book a round trip. The 8:30 pm tour ended about 11:30 pm, and we would have been stuck in the fringes of a public park. The Yokahu Kayak site does not even show up on Uber, and one would need to try and drop a pin there. A taxi would have cost a fortune, since one would have needed the cabbie to wait 2-3 hours there until the tour was done. Once I realized that Uber or a taxi were not viable options, I then found that there were no rental cars available at all in San Juan.
It would have been much more helpful if they had stated on the website or tour description that one would not be able to Uber there.
I then called to try and cancel, but they are very strict about their cancellation policy within 24 hours, and they did not offer me any other options. Luckily, a rental car opened up in the afternoon, so I was able to make it there for the trip after all. However, it ruined my entire morning trying to make other travel arrangements. Travellers beware!
That said, the tour itself worked out fine. The staff there were all very helpful and friendly. You will get wet below the waist, so wear swim trunks and probably water shoes. Yes, there is a bit of a swampy stench, but it was no big deal. It was fascinating to paddle through the narrow mango tree canals at night. Once out in the bay, it was initially difficult to see the bioluminescence. We had a half moon out that night. However, the guides brought out large tarps to block out the moonlight, and my wife and I could definitely see the brief flashes of bioluminescence as the water was moved with our hands, and we could see it later once we knew what we were looking for. It does not look like the pictures, but it is a neat phenomenon.
The paddling itself was very easy, as I had read the reviews about going into the wind and upcurrent and was concerned about that. I am 68 years old and found the kayaking to be very easy.
Would certainly recommend the trip as we had a great time, but be sure that you have a rental car beforehand for transportation there.