This is one of the most popular cruise and for 1,250 baht, it worths it. You will spend a great day aboard this boat....
They will pick you up at your hotel, starting at 8pm. In the morning, no much activities. You might have a dive with mask and snorkel near a beach around 11am but nothing much to see.
The lunch is really amazing. The staff is very helpful and will fill your drink, bring you what you need. Nok (or "knock knock") will entertain you and explain many things about these islands and the fish. The lunch is really great.
In the afternoon, you might have 2 stops. The last one if the must beautiful with hundreds of tropical fish. Really amazing.
On return, you might see the monkey stone where dozens of small monkeys will eat the left overs from the fruit.
And you will return at around 5pm.
Don't forget to bring your sun cream....