From other reviews it seems it’s $7/night with that pass

It's all FCFS dry camping, and $14 per night if I remember. We were there 2.5 years ago and used our Senior Lifetime Pass to get camping at 1/2 price. I'm not sure of the America the Beautiful Pass would also get a discounted rate, but either way pretty reasonable.

Yes you can use your america the beautiful pass here

When we were last there, I believe it was $10/night. Our ATB pass was not accepted. Amazing spot to camp, just be aware of going to far and sinking.

As of a year ago it was $14 a night. $7 a night with America the Beautiful Pass