I think it's a great idea. Though it's always hard to bump people into a new up-close social experience.
Where are you advertising?
I would think city based/public transportation in Albany/NYC ect would be really effective... Those people are already used to the public transportation idea.
All the best!
**I finally actually checked out the site. I see you're located in CO, this would be great for the i-70 crowds and a lot less expensive than Vail Resorts proposed zipper lane. It would be nice if Vail resorts would offer discounts for carpoolers.
Keystone has premier parking for cars with 3+ passengers
The day begins... Your mountain awaits.