I've camped at riverside before and its a nice campground, but its quite a long walk/short drive to the village.. so not right in town. http://www.whistlercamping.com/home.html
its sad... it used to be so much better a couple of years ago....
buttttttt the dave murray park is pretty good and its right next to public, so if you are polite to everybody in there, you can totally poach that park all day long..