We stayed at the Cal-Cheak north site for 2 nights, $15 per night and each site is well spread out. We were a 20 metre walk from the river which was nice. Would recommend getting in early in the afternoon especially on weekends as it filled up quickly with others passing through later that missed out. However there is 3 campgrounds total. 10 mins south of whistler it’s a great place to set up base and head in for the day and look around.
There is an abandoned camper in site #3 if everything is full you could pull in there (also behind it on the creek side is a heap of small wood that is great for starting your fire).
Place: Cal-Cheak Recreation Site
Location: 50.05968, -123.10026