Hey! I'm with Thunder Guard (Thunder Bay, ON). You actually bumped a thread from two years ago. I have no idea what, if anything, happened with Longarm's group startup.
Ontario has a Waterloo area group called Northrend led by Xyston (John Omelijaniuk). They're fairly small and don't have speaking / voting rights at this time. I messaged him for more info and will get back to you once I have details.
There's an Amtgard group in the Toronto Area - Twilight Peak. You could see if any of their members are interested in trying Belegarth. Just be careful in how you approach this - You don't want to steal their members. Maybe try going to some of their practices and talk to their group leaders about it first. Sometimes this sort of thing works out well, other times crossgaming becomes a dramatic train-wreck where the two groups are at each others' throats.
https://www.facebook.com/groups/TwilightPeak/