Slim Jim is definately the man in the know.
Bingin is awesome, but keep in mind that it can get windy there at certain (monsoonal) times of the year. Sometimes it pays to be on the other side of the island (the east coast). You'll still be only 15 minutes away from Bingin, but the beaches on that side will be more inviting. Most touristy accommodation offers either a safety deposit box at reception, or a wall safe in your room.