Looking at the links to the resorts I see Ko ChangChaiChet Bungalows. Strange they show pics of the cheaper no aircon bungalows but not the lovely better ones. You can see the nice ones on the actual ChaiChet website though. Those ones in a row in the photos were 500 only 2yrs ago now it lists them at 1000 bht! The 1600 air con ones were 1000 baht. Really the surrounding islands are much nicer. see travelfish.org for reviews.