Technically if you are roaming on Rogers network (shown as Videotron PRTNR 1), you should be fine.
It’s when you roam on bell or Telus (PRTNR 2) that your usage might be limited.
Do essentially check if there’s some good Rogers coverage where you will be.
Also, make sure to have some kind if written confirmation form videotron about this... go and the chat and ask the question. Send the discussion by email (you have the option to do it at the end).
That said, you will have to keep your Ottawa number.