Rob and Melissa do have a registry on Zola.
Yes, the wedding, cocktail hour, reception, and late night tiki bar will all be located at the site of the hotel outside on the beach, unless it rains. If it rains, the ceremony will take place in the ballroom and the reception will be under the tent on the beach. The reception has cement, so you may want to bring shoes as well as sandals the day of wedding.
Yes, the morning after the wedding there will be a complimentary breakfast held in the Icona Diamond ballroom from 9am-11am.