I wouldn't make any plans to cross the border into Canada anytime soon unless it's considered essential travel. The same goes for Canadians wanting to get into the United States.
Border restrictions will remain in place until July 21 or until a higher percentage of Canadians get fully vaccinated.
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You remember last year, some pretty drunk Americans accidentally floated to the Candian side of the Saint Clair River. This time, it went pretty good. Kinda'.