Antietam, not Gettysburg. Even with that advantage, McClellan could not get a clean victory because he never pressed on multiple fronts early in the fight.
With Pearl, I think they had enough of an inkling that hostilities were imminent that they made a specific effort to keep the carriers in port a minimum amount of time in the weeks prior to the attack. Not so much in prep for an attack on Pearl as to keep them beefing up remote islands and the like. I think Wake and Midway had planes and equipment delivered shortly before 12/7.
Looking at VaRK's picture, I had not realized there were portions of the Arizona still above water, but it looks like the float plane catapults and maybe a turret are still there. I had not realized the Memorial was built across the beam and was not over the length.
As an aside - the Wisconsin is in Norfolk, the New Jersey is in Camden, the Missouri is in Pearl Harbor, so where is the Iowa?
McClellan, the general Lincoln said had "the slows".
