Jon,Oak Harbour *in Slidell is probably your best bet. They keep 2 transient slips. Well marked entry just out of the Rigolets. Fixed piers, but most are in this area. Security on site and the piers are gated. Mark White should be the HM still. Good access to the ICW. Avoid the entry to Lake Ponchatrain from the Industrial Canal during anything above a slack tide if you choose to go that way.
Steve