Why not try some surfing while in Hawaii.

We love the beauty of the underwater and plan on doing some snorkeling and diving while in Hawaii

Your presence physically, virtually, spiritually are the only gifts we would ever ask of you. Some have asked what we really would like and while family is the most important gift we've given each other, time together alone is in short supply. Since we are getting married in Hawaii we have decided to do a mini honeymoon there as well. In lieu of gifts we are asking to donate to our honeymoon fund. Gifts are not necessary by any means, your presence however that looks is the best gift!