The beaches of northwest Florida have nicknames. Some call these sparkling, jewel-toned waters the Emerald Coast. A recent marketing campaign has dubbed the area NoFlo, while others call the region simply the Panhandle. Still, its best-known sobriquet is also its most unflattering: to most it’s the Redneck Riviera. But these days, a sleeker, more aspirational moniker is being tossed around: “The Hamptons of the South.” It refers to 30A, a two-lane coastal highway linking 16 beach communities.