I was on one of ACA's Great Parks North trips this summer, July 23 to August 6. Our group saw 10 or 11 bears, mostly on the road side eating berries. We had no issues in the campgrounds; all the campgrounds had lockers for food. The campgrounds also had very nice cooking shelters.
We stayed in 3 small "primitive" park service campgrounds, which were very nice. In 2 campgrounds the water pumps were posted with signs advising that the water be boiled before drinking. We had a water filter, and I suggest that you bring one along. We had no trouble getting sites in these campgrounds.
We just barely got into the large campground at Lake Louise, as it was nearly filled when we arrived. The Canadian Park system is *working on* an online reservation system, which did not get going smoothly this summer. There are web sites for the Canadian Park system describing this; keep an eye on developments next season.
The trip was great! Al.