We spent a week in South Lake Tahoe at Tahoe Valley Campground. The campground boast approximately 450 sites in four major loops. This is a very family oriented campground, with a pool, playground, tennis and basketball courts. Its very close to all major bike trails and shopping. I thought the bathrooms were tired and not up to par for the price of sites.
Here's the link to the review -> http://www.rvtraveltv.com/?p=450