We keep a little plastic map of the United States in the trailer. Little stones are placed within the state outline to show that we have spent at least a night in the RV there. We began the year having stayed in 44 of the lower 48. Our stay in Utah this summer rated an additional stone and we took this opportunity to visit Nevada. What's a hundred extra miles when fuel is over $3.00 a gallon, when you can glue a stone to a piece of plastic ??