Something that hasn't been mentioned, and I don't know if I
remember correctly, but almost all of this is a National Park.
Someone else can correct me but there aren't many places between
the main attractions (Jasper, Lake Louise, Banff) to stay at
night.  So you need to plan your days so as to get from point A
and have a time line to get to point B. It's dark around 5-530
if I remember correctly.