I too will be renting a car in the U.S. and driving it into Canada for a few days before returning the car in the U.S. So it seems like all I need is proof that I have liability insurance through my own insurance company (Allstate). But all my Allstate insurance card shows is my policy number, make and model of the own car, and the expiration date of my coverage. No $ amount of liability insurance is shown, in fact liability insurance isn't even mentioned. Is this sufficient to drive a rental car into Canada?