Dale's right... The campground has a host who lives/stays there at the site, near the entrance. The host cleans & maintains the campgrounds through the open camping season. There is a check-in station there at the little guard shack at the entrance where you will check in. They have regular, daily/weekly hours when the check-in station is open. If they're closed when you arrive, you just proceed to your campsite and check back in when the station re-opens.
There will be a guard shack that is at the entrance of the campground that is where you'll check in
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