Sorry, I don't know about laser hair removal, but I do know about waxing. There is a nice spa/salon I go to Called Perfection, which has great waxing services, and they tell me many people go to get their backs waxed (ouch!). The salon is about 15 minutes from Rawai camp.
wow!!!!! you will let a mad little thai beauty therapist zap you with a hair removal gun!!!!! aaaaaahhhhhhhhhhhh hahahahah like anything there is prob good places and bad places but I wouldn't risk it thats for sure!!!!!!!!!