If you want an easy way to plan your route in BC, take a look at the maps and route details of the following BC Travel tours:
Lakes & Trails Circle RouteMountains & Vineyards Circle RouteYou can easily combine these two routes into one longer tour that includes the Okanagan Valley, Wells-Grey Provincial Park, and Mt. Robson Provincial Park. Without much effort, you could also add Banff and Jasper National Parks to the route, although they are in Alberta, not BC.
If you include all these parks, you would not want to spend less than two to three weeks in the area to be able to fully enjoy the camping, hiking, canoeing, sightseeing, ferry riding, wine tasting, and dining opportunities of southern and eastern BC.
Have fun planning and even more fun "doing"!