I did the Welland twice last year. Both times were easy and minimal issues.
Down bound was just under 8 hours, and upbound was just under 10.
I still remember the looks as I was flipping steaks on the BBQ as I was guiding the lines on the downbound. If I had more I could have easily sold them for triple the cost of going through, what a hoot....
Enjoy the day for how ever long it takes, the kids
loved it and took hundreds of pictures of tankers, go fast boats and sailboats