Fairmont Japer Park Lodge is the historic Hotel in Jasper. It is between the summer an ski seasons, so you should be able to find some deals.
Alberta Motor Association usually has good deals for the mountain hotels.
http://www.ama.ab.ca/cps/rde/xchg/SI...n-Getaways.htm
One thing you may take note of, the 2nd Monday of October is our Thanksgiving so that may affect your travel some.