As stated, we met at the gas station and then drove to the starting point of the kayak tour. There were only 2 of us that day and so each had their own guide. I can't say whether we were lucky or whether it's always like that.
Our guide was called Nate and was in a great mood. Even though we weren't that good at English yet, he took the time to explain a lot to us about plants and animals. And with a little help from hands and feet, we were able to communicate. The 3 hours flew by. The trip through the mangroves and the peace that you felt during it were impressive.
If you're thinking about doing a kayak tour like this, we can only warmly recommend it.