Tentman - I found this campground on the NPS info maps, and I tent camped there in September 2002.
This gem fills up early and fast, but things ease up a bit after Labor Day, if you can make it then. The best of the 94 sites, along the periphery, are nestled into the moss-covered spruce trees, which are gnarly and stunted from the offshore winds. Two miles away is Rialto Beach, the beginning of a long stretch of wilderness beach that will take your breath away. This is a remote area without convenient supplies, so come equipped and stocked. If your luck is bad on weather, you'll get soaked. Cost is $10 a night, and there is running water and flush toilets, but no showers.