The east part of Kho Samed may be noisy and very busy, but Ao Nuan beach is calm and ideal to relax. The Bungalows is the only accommodation available on that small beach.
No reservation possible but being there during the week I just took the chance and arrive in taxi truck from the ferry: 50 to 100 bth.
They have three types of bungalows, but the closest ones to the beach are without AC with a fan and shared shower. Great quality/price value. Only downside, the mattress is very hard, but that was not a big deal since their is plenty time and places to rest at Ao Nuan Bungalows.
They have food and bar service. I ate their in the morning and for lunch or diner just walked north along the coast to other beaches (nice path link all beaches) where many choices are available.