The GIWW is not really confusing.
Bob's to transit the GIWW, just remember it's written for powerboats so a lot of yje anchorages
are shallow and far apart for sailboats.
I believe the Harvey lock is a better choice if thats the one to the westside of N.O. That time of the year the Miss. flows really strong and you will be upstream of Industrial locks that way.
Sent you a PM.