Do not take the GTVC boat if you need to go to Coconut Beach, as they will not go there. They only have one stop on Koh Rong, at the community pier, and will not stop anywhere else. We had to forfeit these tickets and buy new ones for Buva Sea instead.
It's good that I asked tourist information about my trip. Then, they called the driver to pick me up because the boat was leaving from a different port. It was a bumpy ride due to the rain, but we arrived safe. The driver was good.