Points
Player points are based on seating spot
Last-row seats
A list of things to find before the destination.
Before departure, build a hunt list together, ten to twenty items: a red barn, a tractor, a river, a police car, someone walking a dog, a roadside fruit stand.
Hunt as you drive. Spot a list item, call it, and point it out for verification. Each item can be claimed only once, by its first spotter.
A point per claimed item. Hard items agreed in advance, like a purple truck or a llama, are worth two.
When the list is done or you arrive, most points wins. Tie? Sudden death: first to spot a bird.