A lot of the more popular hotels, like Sunset Cove are getting often fully booked for the high season. Probably a good tip is to reserve your place in a resort before you arrive.
Ko Phangan used to be the backpackers destination, currently a 'more mixed range' of visitors come to the island here. But they all want to find a relaxing and easy going place.
 Khao Lak is a  beach  resort in Thailand, which is popular as a  leaving  point for liveaboard  scuba  diving  excursions  to the Similan and Surin Islands.