I've only been in the Balao class sub USS Pampanito in San Francisco, and I've seen a few wrecks wile SCUBA diving. I should really schedule some trips to some of the others.
I forgot about USS Clagamore, a WWII era Balao class sub I've been aboard. She, USS Laffey and USS Yorktown were all together at Charleston SC at the time. USS North Carolina is in Wilmington NC. Have been aboard all 4 multiple times, spent the night aboard Yorktown with Cub Scouts once.