Why not try Koh Samet Island. Not busy that time of year, room prices are low
and its a great island. Furthermore Koh Samet Island for some reason doesnt get that much rain. My friend has a sailing boat he takes on charter trips. He is based on Koh Lanta maybe u could email him about sailing boat cruises. His email is steve.bateman@infinito.it
Cheers Mark
Bedrock Guesthouse