great camping at Cal Cheak, just south of Whistler. $13.00 per night. http://www.sitesandtrailsbc.ca/search/search-result.aspx?type=Site&site=REC0127 Or you can camp right in town, but it cost you more... http://campgroundsofcanada.com/British-Columbia/Whistler/Riverside-Resort.html
Awesome location. Lots of variety, steep, tight, way too much fun. You will spend hours exploring the terrain. Just show up and enjoy....