This is the now famous North Africa Fly In, this pic seems to have been taken in the early 40s when it first started. Note the crude huts and the lack of vendors or refreshment stands. Prolly around 1941 as the brothel hasent been installed.
In 1999 the event was opened to the online or "virtural" pilots.
Now a thriving annual activity it brings together the best pilots in both the real world and the online world.