The Calgary Stampede is a big deal for sure but IMO overrated. Been there. Also been to a whole bunch of other rodeos, much smaller, with the same cowboys, same bulls, much better viewing & at far less cost, plus much more convenient to attend. Get online for rodeo schedules
On the Canadian plus side, the drive from Banff to Jasper is absolutely stunning. Sorry, the Canadian Rockies put the Colorado Rockies to shame. Get off the main highway as well. Glacier Waterton is a do both sides of the border. Again, loads of info online.