USS Johnston ping!
A little late on the strategery, but as commander, I think Iwo should have been carpet bombed before the invasion.
FWIW, there's a few minutes devoted to the Battle of Samar in THIS Leyte Gulf episode of 'Victory at Sea' -- starting at about the 16:00 mark:
http://www.youtube.com/watch?v=tBMrZSOno-c&list=PLMOJ05TrdIZA7pNQa5YjrHuPIDPdHPIod