Thanks for responding.
I'd really like to spend more time in NOLA. We went on a Celebrity cruise a few years ago and we spent two (maybe three) days there. We went to the WWII museum for almost one full day.
It was around Mardi Gras, so about the same time of year as your cruise. It was really cold though.
We arrived there around 7:30PM so I was really looking forward to cruising up the Mississippi, but it got really foggy and we ended up seeing very little. In fact, we passed a Carnival ship that was leaving and although we were very close, we almost couldn't see her.
We do love New Orleans!