Take this survey before November 8th. There's some great specific questions about mountain biking in here.
Q: What services or facilities are important for you to have when visiting such parks?
A: Well maintained trails
Q: If available in regional or large parks, would you be likely to use:
A: Mountain bike trails

Read on for the scoop from Metro Van:

"Metro Vancouver and the Fraser Valley Regional District are conducting market research on outdoor recreation demand and trends in the Lower Mainland in partnership. This information will help our park systems develop plans to meet future recreational needs. If you are interested in participating please click here and take 15 minutes to complete the online survey."