Try pu-ket!

Try snorkling in a couple of feet of 85 degree water in the Andaman Sea to see some amazing and beautiful sealife-fish all around the islands off Phuket. No tanks needed.

You can stay on the Beach overnight or look for James Bond. PiPi islands have bungalows on the beach. The tourist speedboats leave in the afternoon, and it is time for some native living and food. No need to rough it on a liveaboard unless diving is included.