Location, location, location! This park is not that much more expensive than other parks more than 30 miles away. The sites for big rigs are cement and gravel, no green space, but then we weren't there to hang out at the park, we wanted to see St Louis. It was convenient to catch the train right next to the casino parking lot. $5 for all day round trip. The Arch is the next stop from where you get on at the casino. If you prefer, you can walk (or bike) across the bridge right from the train station. Take the stairs or elevator to the train platform and there is a walkway up to cross over the river on the bridge. 1/2 mile walk across the bridge to Arch National Park. And the trolley is only 3 blocks away from there. Would definitely stay here again just for the convenience of accessing downtown St Louis. However, I would not stay on a Monday or Tuesday as a number of the attractions we wanted to see were closed.