Grant, Here is a link that may help.
http://www.yellowheadit.com/
We took Hwy 3 to Hwy 1 at Medicine Hat, then one on to Moose Jaw (recommend taking the trolley tour from the visitors center), then on to Portage Le Prairie. We headed back to the states at International falls and took the boat tours at Voyager National Park. Then down Rt53 into Wisconsin.
Jasper, Lake Louise, Columbian Ice Fields, and Banff, Yolo, and Kootney are all worth seeing. you will need more than a week to see it all. Sunday Brunch at Lake Louise Lodge, or Banff Lodge is expensive, but suggest doing one once for the view and enjoyment.
Enjoy the trip. We found the roads to be very good, and traffic light, and fuel expensive.
Bob