We stayed there prior to our trip last year, We had a nice site, but no one else was there.  We go very late season (October), the campground closed the next day. Cost was $15/site; $30 for our large group, two sites/ tents.  Restrooms were well maintained.

Here's a site map.  I think we camped at site 37 by the restroom.
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Here's some other campground options.

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starwatcher