I think you should ride Highway 40, through the Kananaskis.
It is an unbelievable scenic, and less traveled route and this highway is only open a few months of the year due to extreme snow. It is also the highest road in Canada through Highwood Pass
between Longview and Canmore. Head north into Banff and then up the Icefields Parkway to Jasper
On your way south, stay at Fairmont Hot Springs and soak in the outdoor hot springs