Apparently when the federal government shuts down, National Parks notify campers with slips of printer paper posted at each campsite.
From The Dyrt user Roberto R. at Mather Campground in Grand Canyon National Park, AZ during the last government shutdown:
“The US government officially shut down at midnight last night. The park is being closed and you are being asked to leave the park. Cancellations will be processed after the duration of a stay has ended and there is no need to make a request at this time.”
#CampOnDyrt, except when it’s illegal.