The Pampanito is worth a visit. The Jeremiah O’Brien is right next to it also.
The torpedo room looks pretty big - it might be the size of my living room - but it's crammed full of gear. I left the next day with a lump in my throat.
I visited SF three years ago this month and the Pampanito was the highlight of the visit. Very well preserved and it was a joy talking to the two shipmates that were onboard to answer questions.