I just saw on the news that the (uber-annoying) Gran Fondo bicycle ride from Vancouver to Whistler is tomorrow (Saturday), so I'd advise those thinking of heading to Squamish/Whistler to either not go, or to prepare themselves for (possibly big) delays in heading up there.
Last year I got caught up in that mess and it was excruciatingly PAINFUL. The ride and the resulting traffic backups from it made it take me 2+ hours to get from North Van to Horseshoe Bay. It was brutal.
So, just a heads up... I'm sure details about their PITA ride can be found via a bit of google action.
As for me, I'll be looking for local-ish rides out the valley way or into the USA prior to the Langley Cruise In.
Good luck to all who venture up!