I lived in Banff and still kind of do
I haven't had the poutine at Barpa Bills, but La Belle Patate in Canmore is just about the only poutine I have had west of the Great Lakes that comes close to what I grew up with in Montreal. They serve all-dressed steamies and Mae West as well.
La Belle Patate
102 Boulder Crescent, Bay 4, Canmore, AB T1W 1L2, CA