I'll probably get flamed for this post after "park on the shoulder" ideas . . . last summer I spent a week up in Whister for a hockey tournament with my kid. We camped at Riverside RV/campground and had great accommodations. Make sure you get an RV site, otherwise you won't have your car with you. The tent sites are walk in only.
The place was pretty quiet and tons of people with bikes and guided trail groups were in there every night. Nice hot showers and it was very clean. Only bummer was our site did not have a fire pit, but most of them did. All sites had water and electricity, I think there was even cable (I don't get that). The main building had a great breakfast restaurant that served up some quality meals. The owners were the cooks and they were totally grumpy, but it made me laugh. Still got a great meal from them.
The base of Whistler was only a two minute drive, but easily could have been ridden to. On a side note, we saw tons of people sleeping in their rigs at the parking lots.
Here is the link
www.whistlercamping.com