At the Grand Canyon (Mather campground), we went over to our neighbor's campground to borrow their mallet (we had failed to bring one) so that we could set up our tent. When we went to return it, we got to talking with the couple. Then the wife mentioned, "I think we saw you earlier today." "Really? When?" we ask. "Oh, we saw you at the visitor's center at the Petrified Forest," she told us. It was true, we had been there!! Fun times when you run across fellow travelers more than once on a road trip!!