Calgary is a young, brash, cosmopolitan city. If you love the urban life you can spend 2 days there no problem.
However the drive from Calgary to Banff, Lake Louise, Jasper is one of the most beautiful drives in the world. Check out the information centers and you will find so many things to do along the way you will have to leave lots on the table for another trip.
We drive from Edmonton, Jasper, Kamloops, to Vancouver every summer and I never get tired of the drive. So much to see. The Canadian Rocky Mountains are diverse, relatively unspoiled, and spectacular.
Every year I am tempted to go somewhere else and each time the pull of the mountains calls me back
When our kids were small we always took them to Radium (another mountain range close by) and a sign there said "The mountains will bring peace to the people " I hope you enjoy your journey. No matter where you go you, there will be a beautiful experience waiting for you.