Hi Thomas,
Good to hear that you are going to spend vocation at KohChang during Oct1st - Oct16th
There are so many accommodations for your selection if you just follow the link of http://www.ikohchang.com
I would recommend White Sand Beach Resort if you are looking for nice beach for sun bath or swimming as well as privacy since White Sand Beach Resort is located at the beginning of the beach. Please review this link and you can proceed booking yourself here http://www.ikohchang.com/whitesandbeachresort.htm there still room available for you.
Perhaps, you could give me more details about what do you like such as Beach, Bar, Diving, Trekking, Water fall, I could come up with itinerary if you please, thank you.