car club

I'm not aware of any Mopar-only clubs locally. You might want to try contacting a local shop that specializes in restoring Mopars like Classic Car Restorations.

You might also want to consider joining a more general car club (like ACCCC) as they usually have lots of members with Mopars and have activities year-round. Rainbow Region, for example, has an annual Christmas party coming up on December 1 at the Niagara Parks Whirlpool Golf Club that you're welcome to attend.