Hey Pat -
I am guessing that people will recommend getting in some Ocean swims ahead of the event. I have heard some good things about swimming out at Dillon Beach by Bodega. I also have not swam in the Ocean, only the bay once and it was very sheltered.
If you want to get together, I would be happy to join you as it is something that you should have some other people around for.
Why don't you throw out a suggestion to the WC Velo group? Dave and Sarah might have interest.
JC#2