Take a ferry from Sookyville out to Koh Rong . It takes about 40 minutes on the fast boat or 2-3 hours on the slow one. Plenty of cheap bungalows to be had. There are some amazing beaches that remind me a little of Koh lipe.
If all goes well the Dragonlady and I are headed that way in Holy Week.
You're fat,Ill fro you in the river