Kartchner Caverns& Tombstone | 365 Camper Kartchner Caverns Camp Spot. Next stop was Kartchner Caverns in Benson, Arizona. We had heard we must stop and see these amazing caverns and they were right! The caverns are located inside of a state park with a campground. Convenient if you're planning a trip to see the caverns. Camping with electric and water hook-ups is $30/night.