Rennsport runs DE events at Mont Tremblant (and Calabogie — I did their fall event there last year as I mentioned).
Most the Rennsport events are non weekend events (usually Monday and Tuesday) though which makes it difficult for many to attend (let alone the logistics of having to get accomodation and the travel to and from). Access to their events is via http://clubregistration.net. I notice that currently they have no events listed — they seem to get added later in spring likely (the Calabogie one was even later).
I think many of the other PCA regions’ track events are accessed there as well. I have not investigated any of those.