JRS: "Please note that in general ESD does not coordinate AM or FM broadcast radio, WiFi, HAM, FRS (aka Talkabouts), GMRS, CB, or RC bands. However if you are planning a high power radio application in any of these bands please let us know so we can isolate your signal in case of interference.
Please contact ESD Communications at http://911.burningman.com/?pg=contact
if you have questions or to register your frequency request."
You would have to do that on playa once you found an unused frequency.