In the clearest of Bahamian waters, my son slows the boat and trims up the motor. The bow meets the white sand with the slightest resistance and we come to a gentle stop. Our eyes scan the perfect crescent of beach, the adjacent glistening sandbar and we congratulate ourselves on navigating our way to paradise. We've triumphantly arrived at Sampson Cay in the Exuma chain of islands in the middle of the Bahamas.