fly the DH crew out to Louisville by biz jet
Not the worse idea in the world but as I think has been pointed out:
What was the avalability of a charter? Some airlines have strict rules ( possibly audit based) on which companies are acceptable for such charters? Slot pairs at both ends? Charter aircraft and crew immediately available, or available soon enough to not compromise rest before the next days duty?
I suspect in hindsight DH by road might have been a more robust solution.