New Orleans isn't that far from me in Houston, so I've been there a number of times over the years. The last time I was there, I had one of my top 5 meals ever at R'Evolution - a collaboration between the absolute Cajun master John Folse and the equally amazing Rick Tramantpo. It's right off Bourbon street in the French quarter but don't let that deter you. I literally licked my plate clean on the Death by Gumbo.
I've also had amazing meals at Herbsaint, Cochon, and Cochon Butcher.
I think I just read that Stella recently closed. Like yesterday recently.
As for nightlife, I recommend ditching Bourbon street for Frenchman. A few other places to wet your whistle: the Carousel Bar in the Monteleone, Belloq, and Cure.
Oh, and daiquiri's at Daiquiri Place Café on St. Charles.