Lake Pontchartrain Info
Suberk, I think you'll find the lake to be a fine place to sail. The depth is pretty uniform and does not have any significant shoals that aren't marked. There is no boat launch at Fontainebleau Park, but there is a nice city launch on Bayou Castine, on the west side of the park. There is no protected place to anchor around New Orleans, but you can stay in the municipal marina at a transient slip. For generally gunkholing from Fontainebleau, you can go to Bayou Lacombe, just to the east. Nice place to explore and wide enough to anchor. Bayou Liberty and BonFuca are nice to explore too. If you have time, you can get out to the Mississippi Gulf islands.. Ship Island has an old fort on it.. Horn is very nice for hiking.. There are nice launch ramps along the coast around Biloxi; that lets you get to the islands much quicker; it is a day and a half one way from Fontainebleau.
Good luck with the trip !