I''m not sure about New Orleans, I do know that there is usually a waiting list. Mandeville and Madisonville on the lake have plenty of liveaboard slips at very reasonable rates. There are many small marinas in Mandeville whose names escape me right now. If you are in the area, the best thing to do is to look around. If not, look up Lake Ponchatrain sailing on the web and you will find a couple of links to area marinas. If you need further info let me know and I will collect some names for you.