Yes, there is an envelope at the entrance with a parking tag in it. You put $4/car in the envelope with your name and licence plate number on it and put it in the drop box and keep the parking tag in your car on your rearview mirror where park rangers can see it.
It's on the honor system. Make sure you take cash.
$4 per car, honor system. I pay every time and every decent person at least tries to (a few times i didn't have change). A lot of maintenance there, you'll see. Tip: bring a gallon of water and a towel to wash sand from your feet. You'll likely end up walking in the creek.
When I went years ago it was like $3 per person. I doubt it changed much. Bring food n water n comfortable shoes that can take mud n water...
$4. Most don't pay, but should.
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