It has been a number of years since we were that way. If you're coming through Calgary, there are several Provincial Parks as you near Banff. As I recall we spent a night at the Bow Valley PP. The sites were very nicely spaced and each was surrounded in wild roses. The facilities were 1st rate. We then spent a couple of nights at the National Park adjacent to Lake Louise. It was a bit more crowded and if you can make a choice, try to get a site away from the RR tracks as the trains run through there on a regular basis, day and night.
As I recall Wapiti and Whistlers were the only campgrounds in Jasper with hookups. We were able to get into Whistlers without reservations but that was probably pure dumb luck. Each morning and evening, we were treated to a herd of elk passing between the forest on one side and the river on the other. They would quietly pass by our trailer seemingly oblivious to our presence,
Air Safe Hitch, Reese Dual Cam 800#, Centramatics