I've stayed at Blue Oaks and Flemming Meadows campgrounds, both are pretty good but there aren't any sites close to the water especially now. I've heard the lake is down but not sure how far.
Here's a map of the lake-
http://www.anglernet.com/web/maps/images/don1.gif
According to the California Dept of Water Resources website, LDP was down about 50' as of July 3rd and dropping about 6" a day.
Real nice lake but not on the big weekends, too many idiots.