Meredith, I was out yesterday by the Westin for a very fun wedding (Pabien Kent and Dianne Meyers!!!) and I would like to advise you to play it safe. 6:00 gave everyone - an intimate party of four - time for the ceremony, signing of certificate, cutting of cake, then photos by the shore. The sunset was a little hazy and it could be played with by the photographer Elnathan because there was enough time...
Good luck, have fun, Happy Wedding!
Margaret