Calgary to Grande Prairie - questions

[AmuleK]

Hey inmates, is anyone familiar with the roads from Calgary, CA to Grande Prairie via Banff, Lake Louise, Jasper and then up through Grande Cache? I heard the scenery is remarkable.

We are planning an Alaska trip, like everyone else, and I want to make sure that this leg of our journey has fine roads and gas within a reasonable distance. Is there any seasonal closures or other issues?

It is one thing to Google Earth and Mapquest, but someone's experience is worth much more. I have included a gpx file of this leg of our planned route.

Thanks in advance, AmuleK