Family of 4 visiting one daughter who lives in NOLA, we found a Groupon for this tour in the welcome basket of our great vacation rental home (The Palmer House, look for a review coming soon!). What a fun surprise- our guide, Christopher, was extremely knowledgeable and entertaining in his theatrical one-man reenactments of New Orleans historical events. Tours were reasonably priced and offer several discounts for seniors, students, military and AAA members.
This company offers several tours that all sounded interesting, but the Strange True tour we took was great for our historically-inclined family.
Lots of walking and standing involved, tour runs about 1:45-2 hours. Tour guide was flexible and let us join a Second Line. We took him out for drinks afterward and the tour continued-- this guy REALLY knows a lot about his city and its past. Highly recommended, although probably not for families with very small children.