Personally I can't speak for this event, as last year's inaugural event was on the same day as the Zapp's Beer Festival in Baton Rouge, but it appears that all the local guys will be involved. The aforementioned Chafunkta, plus Parish, NOLA, Tin Roof, Bayou Teche, Covington and Abita all seem to be on list. In addition, some regional breweries like Lazy Magnolia and Saint Arnold should definitely be on hand as well as some solid breweries like Stone, Green Flash, Goose Island, and Brooklyn.
There also appears to be a NOLA Brewing Beer Garden devoted entirely to cask beers, and I can promise you that's the first place I'd go. Breweries tend to do some more interesting one-off releases to feature on cask for festivals like this so it would be your best chance to try something really unique. There will also be seminars on Cooking With Beer and Food Pairings... definitely worth checking out.
If you're looking for something to do in a few weekends, this might be the spot for you!