From the beginning to end of the ski season (November 01 - March 31), over night parking is not permitted
in the large public parking lots to allow for snow clearing.
However, day-time parking is available at reasonable rates

Most hotels have over-night parking, but the rates are somewhat unattractive.
One alternative is a third party provider

Commercial Paid parking $12/night by online reservation.

Municipal parking:
Conference Centre/ Underground      $10/24hrs     $5/evening $30/monthly;  max stay =168hrs
Library Underground    $10/24hrs     $5/evening     $30/monthly; max stay = 24hrs
"max stay" means continuous uninterrupted stay without movement of the vehicle