TenOC, lots of good advice already posted. Here is my two cents: stay for a while in the Banff/Lake Louise area, and then relocate to the Icefields, and then to Jasper.
Maybe even start with some time at Peter Lougheed Provincial Park.
Spend as much time in the Canadian Rockies as you can. You will be amazed.
"Commuting" on Icefields Parkway is not a great option -- there is often a fair amount of traffic. The road is slow -- 45 mph is posted, and most folks go slower than that because they slow down for the views, which are incredible. So it is better to hopscotch your campsites along the park system, rather than commuting, in my opinion.
The only downside of the Lake Louise campground is the train noise all night long. We had to leave sooner than we wanted to because we could not sleep.
Although we are devoted boondockers, none of the campgrounds in Canada seemed crowded to us. The sites are well spaced -- lots of trees.
If you have the time, add Yoho to your itinerary.
At the risk of repeating myself, the whole Banff/Icefields/Jasper area is world class -- probably the greatest place we have ever visited in fifteen years of adventure travel. And it is a long drive to get there. So if at all possible, devote a long time to this part of your trip.
