I would also park at the Casino Queen. We had no trouble following the direction to the casino and the security there is great. Flag down a security van and ask them to drop you at the Metro. We felt safe taking it but that was during the daytime hours. We took a tour of the Cardinals stadium and the Arch and went to a ball game. There is big rig parking available in the parking lot and I suppose you can even dry camp if the campground was closed. The staff at Casino Queen is very friendly and helpful. Children are not allowed in the Casino but I believe they can eat at the restaurants.