The first dog road-trip kit does not need to be elaborate. It needs to keep the car usable, the dog hydrated, and the cleanup process simple enough that you do not resent the whole outing on the drive home.
Protect the surfaces you care about most
Backseat covers, washable layers, or even a designated blanket can keep the car from turning into a permanent fur archive. Readers care about this because the car is one of the fastest places for dog friction to become visible.
Pack for pauses, not just the destination
Portable water, waste bags, a quick-dry towel, and one food-safe container matter more than gadgets. The best kits support the stop as much as the trip.