Just out of curiosity to see what it would look like, I put all the named destinations on the Summerland leg into Google Maps, and it's basically all a straight line south along Highway 97, ending in Osoyoos, which is right near the US border with Washington.
Osoyoos is a town I'm personally looking forward to seeing, it's a place I wanted to see but never got to when I was in BC. It's the only spot in Canada that's officially classified as a desert.