What would the NPS do if...
You drove into the Big Californian Valley in a car with BASE licence plates, USPA bumper stickers, photos of big wall jumps from Norway, Italy, Switzerland etc scattered over the back seat and with one of those little rig style backpacks on. I'm assuming the Rangers would search the vehicle but they find not so much as a pull up cord or patch of F111.
So what do you think they might do - let you go, throw you out of the park, take your details, arrest you for intent?