Any in the Niagara Region?
If you are looking for information on naturism in Canada, the national organization is the Federation of Canadian Naturists and that is where I would start. You'll find links for all of the Canadian clubs, both landed and non-landed, plus beaches. There is also a non-landed group, Niagara Naturists, that is based south of the border but has activities on both sides. They have clothed dinners monthly for people to come out, socialize and learn about naturism so that might be a comfortable place to start and then they also arrange trips to assorted naturist venues. There are other options further away but this would get you started.
https://fcn.ca/
https://www.niagaranaturists.org/
I don't know if there is anything going on at Lilly Valley anymore (Fort Erie) but there are clubs in Rochester NY, near Hamilton ON, indoor nude swims in Toronto during the winter and nude beaches at Port Burwell and on Toronto Island so if you have transportation there are lots of options within a reasonable area. Those two sites above will get you started and good luck.