For awhile because of COVID, the border was closed to visitors attempting to enter Canada by car.  It may be open now or soon?  There was an article in Minneapolis paper about the ice road US residents were using to get to their homes at the NW Angle during COVID.

I remember going fishing with my uncle in Canada about 20 years ago.  He didn't bother to tell me about his DUI from the 70's in California that supposedly had been expunged.  But the Canada guards knew about it...ended up just going back home.