LSM
Not to doubt your background, but there is no difference in how one would operate at an uncontrolled airport versus a "temporarily" uncontrolled airport. Tower freq becomes a CTAF freq. During the PATCO strike, LaGuardia was uncontrolled at night and that is exactly how we operated. It was still in a TCA, so ATC had to clear us for a visual approach or an IAP, then it wax up to us to go over to tower and make announcements per AIM. We even managed to find the MAT on our very own! Amazing, but then I learned at an uncontrolled airport. I have flown in IMC without a controller and lived to tell the tale, as do many other pilots and passengers.
In the final analysis, controllers coordinate the routing and flight levels of all known traffic, so as we dont hit each other. They no more control planes than they controlled the terrorists on 9/11.
BOAC. No FAR restrictions on night or VFR.
GF