I wouldn't be surprised that insurance companies are wiseing up to Whistler as a destination. Soon enough, there'll be 3 categories of mountain bike travel insurance – Europe, America, Whistler 😉
£200 just to get admitted to the clinic if you hurt yourself and probably £400 if you need an x-ray. Whistler clinic could definitely be accused of gouging but, if you need medical help, its a pretty good place to be.
A couple of years back, Winters busiest day on the mountain was equal to the total number of visitors on the bike park over the whole season. Admittances to the clinic over the whole season for both seasons was almost the same.
Anyway, if you do shop around, make sure that the company you choose doesn't impose any restrictions on mountain biking – of any kind.
For example, I've seen such ridiculous restrictions as: 'mountain biking on paved trails only', mountain biking not above 500m'
Bottom of our booking page has a link to a site that may help
http://www.bearbackbiking.com/booking