http://www.pembertonfestival.com/

click on "Greener Festival"

the festival will promote car pooling with the incentive that cars coming in with four or more people will be able to park for free.

We're staying in Whistler, I don't have great knowledge of the area but I am bringing my bike and I was assuming Whistler to Pemberton was rideable. I'm going to pester them for Valet bike parking, of course I would probably be the only person to use it. Certainly since the show will probably end in the dark, but there is camping on site, I was thinking of going with racks/panniers and bike camping.