Hi Maggie
Depends where you are travelling from... As you are going to Thong Sala, the Haad Rin Queen is no good for you, as that one goes to Haad Rin.
I am including a link with all the ferry details.
Feel free to ask more questions.
Hope this helps.
Cheers
Mark
http://kohphangan.eternaltravel.net/...ransportation/