I'm not in Canada so YMMV but you are usually required to inform your insurer of and accident whether you're at fault or now though often it's better to keep quiet and pay for any repairs out of pocket.
If you have evidence of the other party you should be able to claim against their insurance and perhaps punish an irresponsible driver at the same time.
It boils down to how much it would cost to repair the damage and how much you want the other person to be brought to account.