:I think you misunderstand the area of the island. It's 106 square miles, and based on the map on the page, it appears the island, extreme to extreme, is around 25 miles. 20 minutes in a heli would bring the speed to 75 miles an hour, 12.5 miles an hour in a Jeep (assuming no intervening terrain, which there is), and 5 and a half miles an hour on foot (which is a pretty good clip!).