we are an active group spending 4 days in Jasper, 2 days in Banff, and 4 days in Lake Louise. We would like to do great hikes to see natural beauty and wildlife. we are also interested in white water rafting. Looking for suggestions for hikes anywhere from 1-8 miles- 1/2 and full day hikes. We are going in early August. please provide any must sees and dos.