There are usually a couple EOTA events organized at Arden, Ont (west of Perth) including generally a CMA national run during the summer.
I haven't seen any dates yet but will post when I see them. As noted there are CVMG vintage events and ATAQ modern rounds in Quebec as well.
Most of the Ontario action (ATA modern and CVMG vintage) is on the wrong side of Toronto unfortunately.
Hopefully we see something local on the calendar again soon.
Regards, Doug