SpaceShare Green Travel -- carpool, community building
SpaceShare Green Travel builds ride- and room-share tools for festivals and conferences. Our sister effort Verdant Event builds complete websites for conferences with greening tools integrated.
This basic, brief guide from Zero Waste Action Team has five detailed steps for getting started, plus about 25 more short suggestions for reducing food waste at your event. There is a Green Directory at the bottom with Canadian businesses. The guide seems to be written for food service establishments, but would be applicable to conferences, festivals and parties as well.