Clothing-free resorts have traditionally been rustic, mom-and-pop campgrounds hidden deep in the woods, away from prying eyes and bluenosed politicians. But now, fancy nude recreation spots are springing up along major highways, and resort owners are joining chambers of commerce, sponsoring charity drives and hosting civic events.

"We're no longer hiding," said Joe Lettelleir, owner of Dawsonville, Georgia's Paradise Valley Resort, who this summer proved his point by taking a cross-country trip on a bus that dared onlookers to call a toll-free number for more information.

The Dawsonville resort was once so secretive it was called Hidden Valley. It is tucked along a winding country lane, and once consisted of little more than a few RV sites around a foot-deep pond.

But now it is undergoing a major luxury expansion. Neighbors and business owners are encouraged to stop by for a look at the 108-acre property, which was turned into a clothing-optional resort to encourage more visitors. And annual fundraisers for local charities draw hundreds of motorcyclists and joggers to its gates.

Read More