If your intent when in NOLA is to visit the city, I'd suggest Bayou Segnette State Park. Very nice campground, and inexpensive as well. Located on the south side of the Mississippi River directly across from the city, it's a great place to base camp. There is a ferry about 20 minutes away that takes you across the river to the intersection of the French Quarter and the Arts District. Cost is a buck or two each way and it runs every 30 minutes. Parking at the ferry terminal is $5 or $10 per day depending on weekday or weekend/holiday. Definitely where we'll stay again.