Why? Where's the threat coming from?
Those ports not big enough for a Nimitz class or only one carrier per port?
Pennsacola, no. Charleston closed down years ago.
How long ago? In the 70's Charelston wasn't a carrier port but Mayport FLA is and at one time I think Brooklyn, NY was a homeport maybe up till the 1960's. I know Brooklyn once had a carrier building yard there. Charleston IIRC was too shallow for a deep draft CV. A Forestall nor KITTY HAWK would have fit in there. Possibly Lexington might have or an LPH.