Digging around I found out the wreckage of Yamato had been found and surveyed not once but twice in the past 20 years. If this series of photos and a diorama constructed from them are correct, there just isn't much for the 2202 crew to raise.
The violence it took to tear apart a ship like that is nearly unimaginable. Very, very sad.
As I remember it, it's in roughly 300m of water (per Wikipedia). Time to get one of them there underwater travel-thingees with windows and take a road trip. Followed by a boat trip. With an eventual under the water boat trip.