We are about to set sail in our little motor boat, the Liz III, from Lizard Island’s main resort beach, off to explore Turtle Cove on the island’s southern coast.  The boat is all ours – no co-passengers, no skipper, no guide.  Just the two of us, our snorkelling gear, our underwater cameras and our enormous lunch – two eskies full of drinks and food that were hauled on board by the beach club crew, and now sitting low in the bow of our boat.