After we got out of our tour van, we were told by the guide that we could roam freely for up to an hour or so. We would then meet back to go for a boat ride to see fireflies.
As for the fireflies, well, we were slowly cruising along a canal which has trees with fireflies in them. Not as many as you would think. Just a handful in each tree, not even a hundred. It was nothing special. I tried capturing some photos.
We returned to our tour vans and headed back to Bangkok. This was a long tour, even though we only visited two places, it used up the entire day. By the time we arrived back in Bangkok, it was well past 8PM. Still, this combination of the Maeklong Train market and Amphawa Floating market is one I highly recommend if you are looking for some unique day tours from Bangkok.