Sadly, I do not know which boat he hustled the ice cream maker aboard, alot of family history has been lost with the passing of my elders. I do know that he was on shore leave when his first boat, the Grayling (SS-209) had emergency orders to pull out for a mission and he and another shipmate missed the Grayling's departure. The Grayling was lost with all hands near the Philippines on that mission.
The other boat he served aboard, I do not know the name...this one was sunk by a Japanese destroyer and he managed to escape through one of the foreward torpedo tubes, but suffered the bends for the rest of his life as a result.
His last boat, the Cavalla (SS-244) *may* have been the one that was graced with the glorious source of ice cream. It was also this boat that sank the IJN Shokaku, him being the foreward Torpedoman most likely handled the tordepoes that sank her.
As an observation about the suicide issues:
This modern generation has not seen the personal hardships that the WWII era generation suffered. The great depression was a time of desperation, and a shortage of everything, People had to make due with very little and this created a generation of people who would roll up their sleeves and deal with whatever the problem was at hand. Many joined the military because they were broke, orphaned or just trying to escape the life they were dealing with.
I am not trying to belittle the younger generations, but they have grown up in some of the most prosperous times in human history and are not really prepared for hardship, even with military training.