Cousins Wedding!

Hi! I am in charge of decorations for my cousins wedding. I am getting nervous. She told me it is going to be simple, but I don`t think so! They will be marrying at a beach here in hawaii, with the ocean in the back. So far this is what I have in mine, I plan on having torches for the aisle with ti-leaf leis draping from one torch to the other. Tons of flower petals covering the aisle on ground, with an arch decorated with tropical flowers and foliage. Something is missing here, I think? Can someone add more to this, to make it more elegant. I don`t know.