A nuclear war type scenario...
No, it's an epidemic.
And yes, "zombies" are a problem
Solar chargers are a good idea. What is the probability to find a solar powered system in a modern airport? I've seen solar panels on municipal buildings here in Florida, but not sure about airfields.
A mower is also a good idea, it can be easily found and hand-started. Will it provide enough power to jump-start a truck engine?