First come first served.  $14, but they had a sign up that said it might be raised to $20 in 2024.   Only 2 America the Beautiful passes include discounts to this campground: Access (handicapped) and Senior.  And I must say, after going all the way up to Wolf Gap (on the other side of I-81) to check out the free USFS campground up there and finding a bunch of unstable homeless people, I was glad to pay to have upkeep and hosts. 

In October (2023) I arrived to EF at 3:30pm and about half of the spots were taken by a mix of tenters and RVs.  The campground is well-cared for, and there were hosts present. 

Please do enjoy the drive to the CG, as it is quite beautiful.  And although the winding road attracts some car & driver types, by nightfall, it was completely quiet.  I slept in my jeep condo and put up a privacy tent because I am tired of campground bathrooms.  I am not sure the hosts really understood the concept.  But they didn't say anything other than to inquire about my strange lodgings (they thought I was sleeping in the privacy tent!)