CNN — David Yeskel remembers the days of yore with packed shows and crowded casinos and, especially, all-you-can-eat buffets. Barbara Kraft/Wynn Las Vegas The same challenges cloud other tourist magnets where “all-you-can-eat buffet” is a byword for a luxe – or at least generous – experience. The idea, says restaurateur Elizabeth Blau, who helped create the buffets at the Bellagio, …