Re: Montreal?

Traffic in MTL can be a real "adventure". (Lived there for some years back in the day!) If it were me I'd settle for the KOA as it is reasonably close, and then Uber either downtown or to the nearest Metro station. Of course it depends on what you wish to see in the city. For me, it would be the food!

I've never found that campgrounds near major urban cities are all that great. They just do what you need, so if that means a few kids hollering, so be it.