Florida does not seem the best location for a presidential bunker. Florida has a heavy military presence and would be a major target in a nuclear war. In the Kennedy-era book “Alas, Babylon,” about an imaginary nuclear war, Florida is hit hard by the Russians, even though the story involves a group of survivors in a small Florida town.
No point in building the bunker in Montana when the president vacations in Florida. They needed something close by.
Palm Beach
I would think that at the outset of a nuclear war the enemy would target our command, control and intelligence (C3I) capabilities, so the bunker would be a prime target wherever it was located.
Like Moltke said, this was intended to be a quick and dirty bolt-hole if the ballon went up and there wasn’t enough time to get the President somewhere better, but further away.
Raises the question of where the other Presidential (and even VP) bunkers are. Ike had Raven Rock/Site R near Camp David and his Gettysburg farm. But we can assume that LBJ, Nixon, Ford, Carter, Reagan and Bush (if not Clinton and Bush) had ones near their Summer White Houses as well.