Riverside sits directly on the high river bank between Sandy Beach and South Beach.  It is full, deep shade all day, which also means no grass.  It is a short walk to either beach, and is a great place to be at the end of your float. n the early season, when the river is still running higher, the only beach available is Big Beach, which can be reached by walking or driving.
This site is fairly secluded and private, but seems to allow sound to travel rather easily at night.  If your group tends to be a bit boisterous, you may want to choose a different site.
Larger motorhomes and longer trailers may have some issue with getting into the site due to some tighter turns.  It is also a long, slow journey in for larger vehicles.