Park officials are reluctant to provide details of their investigation into reservation-flipping but say they are aggressively trying to identify perpetrators. According to an NPS "director's order," resale or auction of advance reservations is prohibited. But can those cashing in on Yosemite be criminally prosecuted? And if so, who would do it? Gediman said the legal aspects of how to handle profiteers are under review by National Park Service and Yosemite officials, along with other federal agencies, given that multiple jurisdictions likely would be involved.
http://www.sacbee.com/2011/04/18/3559595/scalpers-flipping-yosemite-reservations.html