No way Tremblant is 115$ for only the lift ticket, that's more expensive than regular season. If that is for hotel +lift ticket then good deal.
Not sure how long it will last but usually they have cheaper tickets at the start of the season. Also check out Costco, they usually have Tremblant lift deals that include a 10$ meal voucher.
Have you ever been to Tremblant, Mont Blanc or Sauveur? If this is a vacation and not just driving up for the day I would suggest you go to Tremblant. The other ones are like small Ontario hills compared to Tremblant. Go to their websites and look at the trailmaps.
Tremblant also has the village so if you like to party then the place can not be beat and definitely worth paying a bit extra to be near the action.