You've chosen a good route. The shortest route would be across the Mission Bridge, through the village of Matsqui, turning right onto Harris Rd. (Inter-Provincial Hwy.) (56 ave.), crossing over the freeway to re-join 56 on the south side and continuing west through Langley and onto highway 10, crossing over the freeway onto Ladner Trunk, following it west to highway 17, taking highway 17 to the Ferry. This route has more steep grades (between Matsqui and East Langley) then your route. The most dangerous section of your route is between Mission and Whonnock. Most of it can be by-passed by using the parallel road between Mission and SIlverdale just north of the main hwy.