I also liked Hayman Island. Snorkling is great around there but you do need to get to the main reef for serious diving. Being an international destination, do not be surprised by women being topless on the beach as people from all over the world go to Hayman Island.

Other choices you may wish to look at include Dunk Island, Turtle Island, Great Kepple Island, Heron Island with each of them being different from the other. Some are commercial, some are very laid back.

Whatever you do, enjoy your trip to the Reef !