Yeah, though this wasn't just luck: as I read, the F-117's used the same route several times, and Colonel Dani's battery was placed on that route deliberately.

Another popular urban legend.

Each SAM battery used to have two locations.
One is for peacetime, the other is for wartime.

When OAF started, Serbians decided to spare their assets, as long as possible...
... so on the first night, only two (7th and 8th) battery was activated from the available eight to defend Belgrade.

All the others were moved to their wartime location, and waited their turn.

The 3rd battery peace position was at Jakovo...


... and their wartime "secret" position was an old Dvina site beside Simanovci.
They relocated there few days before the war broke out.
(this picture was made later, when the 6th battery was located and bombed here...)


When their turn came on the third night, they were lucky as the F117 flew the right path, no Weasels were around, and their crew was the best.
(Before the war, Jakovo site stored and used the Akkord of the JNA)