Laem Son.
This is my first visit here. The staff provided excellent guidance. The restrooms are clean, and the place is very natural and peaceful. The Alexandrine parakeets (similar to parrots) are very noisy, but when you walk by, they hide and become completely silent (it's quite funny😄). The pine forest is shady, and the beach remains natural. There are no food or drinks for sale here, so if you plan to stay overnight or camp, you should bring your own supplies.
Heading towards Bang Ben Pier (Koh Piak Nam Noi), the view is also beautiful. Unfortunately, I didn't get to take a boat trip to the islands. Currently, boat trips to Koh Kam Tok, Koh Japan, and Koh Bat are available. You need to rent a boat for 3000 baht, which can accommodate 10 people, excluding food and park entrance fees. If you come with a group, it's worth it. We arrived in the afternoon, so we missed out. Such a pity.
If you're interested, you can contact the National Park. I heard that the boats are long-tail boats owned by the local community.