Cinderella dress on beach???

My FH and I discussed having a beach wedding in Florida, so we wanted more of a casual tone to our wedding. Originally I was thinking maybe a chiffon flowy dress, but I made the mistake of trying on this huge toile filled dress with a train just "for fun" & now I'm falling in love with it! I've heard that those big dresses on the beach make beautiful pictures, but I just don't want it to look funny with me in this magnificent dress, & my FH not in a tux. I just don't know if this Cinderella dress is too much for an outside wedding? What do you think? Have you seen it done before?