nvubu, a great challenge. I learned a lot in the process of tracking it down.
Once you showed the Russians doing a pre-flight, I guessed Ladd, because I had read that this was where Russian crews took over the Lend-Lease aircraft.
Re your last image - you don’t need to go to Alaska for conditions like that. I’ve seen similar ice-fog in southern Alberta!
I have a challenge on my computer. Please standby.