A few more tidbits on the submarine voyages --
A 4 page article in
Popular Science in 1959,
"How the Nautilus Hit the Bull's-Eye at the Pole":
North American Aviation retirees' newsletter (9 MB file). Article starting on pg. 4 with a technician's log of his trip under the pole aboard the USS Skate, taking place at the same time as the Nautilus voyage.
AIAA paper on N6A, free page 1, all others pay cash: