Patriots Point in Charleston SC is a great WW2 stop. The Yorktown carrier is a floating museum with about 20 warbirds. The ship models are amazing, hundreds of them. You could spend 2 days in it. I like sitting on the bridge and listening to the actual battles as they were heard.
The Clagamore sub is still there. I heard they were going to scrap it, but believe they have gotten funds since. Was a Balao converted to a Guppy.
Overall, it still needs a lot of work and you get limited access, not the best visit for a sub, but nice over all.
Also a WW2 DD there, somers class, but may still be in dry dock being redone, so check.
Why you're in Charleston you can check out the Hunley, civil war sub. Course Charleston being a historic town plenty of other things to see.
http://www.patriotspoint.org/