We had a nice time, I will list negatives in a moment. I selected Private tour. Our guide was locally knowledgeable and interesting. Stopped at a (closed) temple. Pretty but more a stretch break. Then a stop to a lighthouse view and had fun feeding the monkeys on way to shanty town along the river. Paid extra for Eagle feeding as we arrived 90 minutes prior to Fire Fly event and we did NOT include dinner which would have also killed time. We did NOT do bio luminescent trip.
If you have never seen fireflies or eagles, youll find this trip interesting. We have fireflies and eagles in NJ, USA so nice to compare these. Fireflies more like LED Christmas lights where some clusters of fireflies would blink together. Pretty cool to see. There are way more smaller white birds as part of the feeding but eagles were present as well. They basically chum the water and birds go crazy for it. (the trip would sound way less cool though if they said small white bird feeding). The eagles were cool to see but not as large as USA Bald Eagle. But a fun day with nature. Oh, there toddler crabs along the river at the boat dock were fun to watch. Tide was out so lots to see.
Other than our car ride, there was nothing private about the tour. Group boat to Eagle feeding, group boat to fireflies and group boat to bio adventue . so not sure how they get to say Private. If it were raining, this trip would be miserable. Stand in rain outside a temple, wet monkeys climbing on you, no view from lighthouse, wet boat ride.
Bring some snacks and you can chill on the dock and watch the river traffic if you don't sign up for dinner....also I'm sure you can just go buy dinner. Lots of places to eat along the river.