I have some of my father's USAF flight maps when he was a Navigator/Bombadier flying SAC B-47's, B-58's during height of the Cold War. They have flight paths, station/hold points inside the Arctic Circle (above 60 N). They're in storage back in US, otherwise I'd scan them to prove you wrong. The only thing remarkable was the markings for compass corrects due to proximity to Earth's magnetic North Pole.

Edit: I also saw the "classified" maps showing NATO/US and Soviet strategic 'assets'. But I don't have those maps. I remember my mom bringing him dinner when he was at the SAC alert pad. He'd come to the gate with armed security guards and I remember him having a briefcase handcuffed to his wrist. Those were the arming codes, targets, etc. He later told me that there were pics of bombing targets taken from the ground. It was obvious that we had operatives inside the Soviet Union. 40 yrs after retirement from USAF, he still had secrets he wouldn't reveal to me. When I held 'Q' security clearance, I understood why. He knew of "geopolitical sensitive" locations of US nukes.