Try Thema collection, Uga, W15 or Aman hotels, Hilton Yala resort..Bit expensive, but can assure peaceful & a memorable stay.. At Thema you can try maalu maalu, Galoya wildglamping. Aman of course the amangalla n amanwella.. Uga entire collection is good.. W15 Hantana n Nuwaraeliya are good...