I haven't even printed out a list of vegan-friendly restaurants yet

A good many of the restaurants are still closed or are operating on limited menus (via someone currently living in NO).

I'll be interested in hearing what it's like from you when you get back. The Mardi Gras coverage made it seem as if things were fairly sane, but I've read that there's only a small strip near the river that habitable, and the rest is still mostly abandoned.