One road we really like is highway 22, which runs parallel to the foothills. We got on that and started south - a change from our usual route of the Trans Canada highway. It's a relatively new road, so nice pavement. The traffic is always light and it is scenic. Unfortunately on the day we went, it was overcast and off and on rainy, so not as nice as it could have been. Still, here is a pix to show the potential.
Highway 22 dumps you out at Lumbreck Falls at the south end, where we caught highway 3 and headed west.