Accommodation within the park can be tricky whether you are coming for a week long ski holiday, ski bumming until the snow goes bad or staying for a whole season. Cheaper accommodation can sell out and random car/tent camping is illegal. Finding long term housing can also be difficult and expensive. It is wise to plan well ahead if planning on staying in the area otherwise you may be forced to stay outside the park or pay more than you would have liked.

Banff & Lake Louise Tourism Accommodation List
https://www.banfflakelouise.com/accommodation

Alpine Club of Canada Hut System
http://www.alpineclubofcanada.ca/facility/

Bow Valley Home Finder Facebook Group
https://www.facebook.com/groups/bowvalleyhomefinder/