the Bell House bungalows are simple but have new clean rooms with hot water shower, fridge and AC.
the Vong duan beach is located on is one of the best on koh samet. it has several restaurants along the water. For daytime I can recommend to do a 30-40 min walk 2 beaches down south to Ao wai, it's more quiet and not so many boats. It's a perfect retreat for someone with little time, with close access to BKK. I paid 2,500 BTH for 4 nights.