trang is worth it for the peace and quiet. Don't count it out. Koh Lanta is good. Closer to you worth it is Koh Chang (airport close). lots of peace and quiet there. great beaches and some really nice resorts. i stayed at siam bay resort a few times. beach isn't great but everything else is awesome. go further down the island to bailan beach (i think) and its almost a throw back to the old thailand. very limited still and not too built up.