This ones at the Markham Fairgrounds on the weekend of July 9-11/04.
I believe it's the same group as the St.Lawrence and at Centennial. But I think there's more. The website says there will also be shrimp kabobs, lobster, oysters and cajun rice and of course the Blues Bands.
I wasn't able to go last year so I can't give an opinion. But I will likely be going this year.
See the site below.