Many thanks for the answer. I see that reservation option is available now which I really appreciate. I need to think it over seems it is kind of expensive for me, especially when there is no guarantee of the weather in September.
I have a friend who strongly recommended Dusita to me but she spent a couple of days at your resort during high season 2 years ago and it costed 900 THB then. I am not sure if I can afford minimum price of 1290 THB per night