Probably I'd do what was suggested but when I got to Banff, instead of turning around, I'd go into Calgary which is only sixty miles. Then I'd take the highway straight up to Edmonton. Calgary to Edmonton is only about 3-4 hours, at 70-75 miles per hour. Straight flat highway.
In fact if possible, try and to get an arrival flight to Edmonton and then a departure from Calgary.
I grew up in Red Deer which is right in the middle of Edmonton and Calgary.