relicrunner,
You are correct in your assessment of the museum. It is rebounding from several years wherein the emphasis was on "Museum Theater" or something like that. Many artifacts that had been on display were tucked back into corners and/or generally placed into storage. They have a number of really interesting projectiles and at least one frame torpedo. The biggest issue in getting the material back out for the public to see has been money for proper display cases, floor space, etc. The financial support from the city has fallen off over the years and they haven't had the resources that such a fine musuem should have. The new (April of this year) Executive Director is a delightful lady named Holly Wait. She has reinvigorated the staff and made many changes that have just begun to show through to the public. The smiles on the faces of the staff reveal much.
The staff has considerable experience and the living history element with the CSN crew is especially impressive. I would encourage anyone who likes large guns (naval, seige & seacoast) to visit the place. There are numerous (6?) 9" Dahlgrens (oddly scarce the further you travel south) and examples of 6.4", 7", 10" and 11" double banded Brooke guns can be viewed there if you don't mind a short drive to a local cemetary to view the 6.4". They also have a Parrot rifle althought I don't recall the bore size. There are occasions where they fire a 5 lb charge in S-111 (original Selma tube) - that is also impressive. You can contact the museum to find out when they will next offer that demonstration.