Snorkelling Around Pattaya/eastern Seaboard.

[keebone]

Already posted this in the Pattaya section but thought I'd try here for those of you who dont like to be seen posting over there

Is there anywhere within easy reach of Pattaya that would be any good for snorkelling. I know Koh Chang and Samet are reasonable options but would prefer somewhere I could drive to as a day trip without too much bother preferably. I've read that Koh Si Chang is ok for snorkelling and having been there before wouldn't mind a trip back but would apreciate other suggestions.

I've only snorkelled a couple of times before, once in Barbados which was great and in Samui a few days ago which was ok but far from spectacular. I'm not the worlds strongest swimmer so somewhere not too daring would be best.