The only place we have stayed in St. Louis was at the Casino Queen RV Park that is part of the Casino just across the river from the Arch. We were just passing thru and were there for only one night. As I recall they advertise transportation across the river into the city, but I can't verify that because weren't there long enough to check it out. The park itself is on the casino property and it is very clean and secure. Of course they want you into the casino and we did go there, but only to enjoy a good meal! One word of caution; it's not in a very good part of town, and being unfamiliar with the area and the fact that it was after dark it was tough for us to figure out the right exit to actually get on the property, but once we go there it was a good deal and secure and very nice. JMHO