Anywhere else. If Canada finds out you have a DUI in your past, and they WILL find out because they are an advanced Western country with the resources and intelligence to do so, they will turn you away at the border. This is a well known fact and such a routine occurrence it has its own page on the Canadian government's website:
https://www.canada.ca/en/immigration-refugees-citizenship/se...
To wit:
committing a crime, including driving while under the influence of drugs or alcohol