We are tryin to find a place in thailand like koh samui 12years ago before being built up and sky high prices?

we did like samui because it did still hav the backpackers feeling and not built up and not expensive one example we used to stay at the ark bar bungalows for 300bht ok its upgraded but now 2000bht. samui was good for the beach life but you also had good night life. we are looking for the same in another part of thailand any suggestions.