There are several in Marco. The few left around Naples were full. I can't remember the name off hand but there is one downtown near Tin City. Wiggins Pass used to be the largest with great gulf access. it is going all condos and is closed for good.
I had to go to Fort Myers Beach for a rack. Since two other Marinas closed withn a mile they have filled up as well. Even though I have a lift behind the house you can't leave it in the sun and salt all the time.