We sailed the Spirit in March and had such an enjoyable cruise.
We were in 10080, so I can tell you the cabin is fine.
As a Louisianian you will enjoy the sail down the Mississippi, if you've never done it. I was raised in N.O. (now live in Alex/Pineville) so I always enjoy seeing those levee towns and wondering how the devil people live there. Unfortunately it willl be dark by the time you hit the gulf (I've always wanted to see it in daylight) but you will be able to see the rigs that look like Christmas trees lighting you way through the night.
On the flip side, coming how you'll do a big sigh when you see the first "tree" because you'll know that you're almost home and the cruise is over.
It's always nice to escape Mardi Gras, if you've lived through enough of them, just be prepared to for possible street closures and delays as you make your way to the pier. Several posters have almost missed the ship as they drove in to a parade route and weren't familiar with the city.
We are going to do the Spirit again next spring but probably in early March - miss Mardi Gras and Spring Break is my plan
If you have any questions pm me and i'll try to help