I'm in the beginning stages of planning an 18 day Australia trip. I want to get in at least a couple fantastic snorkeling trips. Where are the best snorkeing place between Port Douglas and Mackay? I am looking for incredible coral and outrageous sea life (no sharks). I don't know if I should be looking at the inner reef, or the outer reef. I have read about Whitsunday, and I am unclear if that is the best snorkeling or sailing. Any comments, and personal experiences would be appreciated.