Most of the suggestions from fellow New Orleanians so far have been great, so no need to repeat them.
But one thing you folks ought to do if you have time is take a bus or van tour ("destruction tour") of the many still-decimated parts of our fair city. The places you'll be--from the French Quarter to the Dome--are in great shape, but much of the outlying city is still in ruins. It'll help you appreciate the magnitude of what happened almost 2 1/2 years ago, and why Louisiana still needs help (since much of the country is far beyond "Katrina Fatigue" now).
I live 4 houses away from the 17th st. Canal Levee breach--the one that was on the news daily with the helicopters dropping the big sandbags into the water. I'm back, and if you tour by, look for the house with the 8-foot inflatable LSU Tiger holding up his finger "#1". I'd be happy to show you around and welcome you to our "working to once again be a" fair city.
I hope many of you make it, spend your money, enjoy the game (not too much!) and tell your friends to come to New Orleans!
Geaux Tigers!
Go Buckeyes! (sort of...)