A camping forum for VW bus and camper owners.
I just came back from looking at a campground on the Feather River, 55 miles north of Sacramento. It's very much like the Sandy Beach Campground at Rio Vista except for the lack of flush toilets and electrical hookups. There are porta-potties, which were clean and well-stocked. Although some bushes obscure the view of the river, there's an easy boat launch right at the park.
It's pretty inexpensive: $10 a night per car for camping, $5 for day use. No category for extra vehicles; everything with a motor pays the ten bucks. Trailers, however, are not considered extra vehicles, so they're free. The site has picnic tables, barbeques, and firepits. No reservations are allowed, and they're probably not required, since this isn't a well-known campground.
For more info on the park, check out: