I do know this, YOU will be denied entry if you have a DUI/DWI on your record in the last 10 years, would not waste my time trying. They take a very dim view of drinking and driving in Canada. I do know from personal experience with one of our party, didn't know he had been caught and had a record in the US but they sure didn't let him in, took him back to Grand Forks and put him on a plane home.
Saving the Poodles of America, one Alligator at a time!!
The early bird may get the worm, but the second mouse gets the cheese.
Everyone has a photographic memory; some just don't have film.