In reply to andy_pemberton:
My memory is slightly different...
We did it an hour or so before a small high tide; I just managed to do the zawn bit without getting wet by a somewhat undignified near-crawl. My friend just put his foot into the 6 inches of water at that point :P
I remember there being a lot of walking along ledges and super-easy climbing over rocks; I thought there was a lot of shallow water. But it was easy enough this wasn't a problem.