No one was digging clams, only surf casting
The campground at Clam Beach has seen better days, the location is great. The website tries to manage expectations:
Because of lack of financial resources, Humboldt County park facilities are considered to be more primitive than facilities managed by other agencies. …[M]any visitors enjoy the more rustic setting offered by the Humboldt County Park System.
It's working for me. I love beaches. I'll be staying until Sunday.