Camping has declined by about 20 percent in the Great Smoky Mountains National Park since 2000.
Park spokesman Bob Miller said the tastes of the camping public have been changing, with an aging demographic.
"Older people are less prone to maybe rough it and sleep on the ground and tend to be more prosperous," he said. "Now that the kids are raised, they can afford to stay in motels or they can stay in an RV."
According to The Daily Times, he said the drop is a trend in the National Park Service.