I would highly recommend the Okanagan Valley (south-central BC) as part of your tour, especially if you are a wine lover. It is an area of long, narrow lakes in a glaciated valley, with hillsides terraced with vineyards, beautiful flowers and fruit trees everywhere, and wineries with great food as well as good wine--makes me want to be back there just thinking about it. And you will be there at the perfect time to stop at roadside stands selling fruit.
There are some nice provincial park campgrounds in the Kelowna area, although they are often very full during summer. Early autumn might be less crowded.