kruz
Contributor
I agree with Quero. The daytrips out to The Similans are too time consuming. You would need a minimum of 8 hours to travel back and forth (by road and speedboat). The best way to see these sites is via a Liveaboard boat for at least 4 days.
Have fun!
As i want my familiy to enjoy this trip, Similans will wait for some liveaboard trip. Quero,i will answer your PM with details.