yea, just have id stuff, dont play music, and try not to go across at peak times (friday evenings, sat evenings, sun evenings), but it can be a toss up. if you go through vancouver during rush hour - have fun, the traffic is worse than seattle. the road to whistler can be quick, but if you get stuck behind assclowns, then you go slow on the turny parts and fast on straight sections.
but yea 3 hours if its good to whatever if its bad