Dark skies are usually far from cities, which means far from snack stores. Pack your food before you go.
A simple checklist: a blanket or reclining chairs, a red flashlight, a star map app set to night mode, water, and a few bags of shelf-stable snacks that survive a warm car.
Jerky is ideal for that last item. Our Korean BBQ (codename Rocket Striker) is a mild, sweet-savory flavor that most people in the car will happily share.