Listen sorry for late (very) late reply. In the meantime you probably canceled your trip to Thailand because of Covid19. Beach in Ao Nang is not special but you can reach so many beautiful islands in a few minutes. Since perhaps you will eventually come in 2021.... still have time to answer your eventual further questions. Greetings from the only Covid19 FREE country in the world. Thailand is magic

If you like beachs you can visit Railay beach and phra nang Cave Beach and Hong island very easy by booking longtail. Phra nang you can kayak around some parts of it which is good. There is also a 4 island Speedboat trip for 2800baht each including food and drink... We didn't do this we choose just to do the day at bamboo which cost approx 1400baht per person Including food and drink and its only 40mins away by speedboat. I wouldn't waste any time on Ao Nang beach for swimming not very good. Krabi night market is also not far away.

Most guides will take you to both places but if you have to choose between the two, I'd choose Koh Ha. The turquoise water is just amazing. But i noticed your question is either island hopping or koh rok&ha. If you choose snorkeling, the tour will include going to different islands anyway which also includes lunch.

Di o not swim at the cliff end of beach . There is open sewage that pours into the sea ,, it’s dirty and smelly down there .. please go walk there you will se and smell the outlet ..

Railay is only accessible by longtail

I could say Klong Muang Beach but really quiet and nothing much around there. I went to Klong Muang Bay view resort and there is small road to access to the beach and only 1 restaurant over there.

כן. בקלות רבה. יש מעבורות כל כמה דקות. ממלאות 8 בסירה ונוסעות. 100 בהט לכיוון לאדם. הכי זול והכי קל.

I was in Dusit Taani Tesort, it had a wonderfull beach