We seemed to be hitting the viewpoints at the same time from here on out. I chatted with the sister in the drivers seat, asking:
Do each of you take a turn at driving from each viewpoint?
She replied:
No, I'm the only one with a drivers license. And... she'd never been here before this year.
No? I replied,
She further explained:
But I've been here three times already this year!
Apparently she had been appointed to chauffeur (chauffeur-ette?) several groups of sisters over the summer.

Cool!