I just drove to Chicago, IL in my RV for the weekend and discovered a very large parking facility for RVs, Tour Buses, Motorhomes, Boats, etc., that is very easy to find and use - the McCormick Place Marshaling Yard at the intersection of 31st Street and Moe Drive. It doesn't seem to matter what size your RV is and given the facility's size, you can be towing just about anything, so long as it’s legal. The facility has lots of open space. Rates probably change depending on the season and local events, but I paid $21 a night (August 2013). Entry and exit is through a manned station with gate arms. Since I was staying in a hotel in the City, the attendant gave me the phone number for cab service as well as a location code. The cab arrived in 5 minutes and cost me $16 total to go to my hotel on Friday afternoon during rush hour. My return cab ride on Sunday was only $12 total. My hotel was at the Monaco in the loop, which is walking distance to the theater district, Millenium Park, and shopping. Directions to McCormick Place Marshaling Yard: US-41 South to 31st Street Exit. Go right (West) on 31st Street (away from the Lake). Take Immediate right on Moe Drive. Now take first left into Marshaling Yard parking. This a giant parking lot, so don't expect to see trees and shrubbery - just pavement, vehicles, and a small building. Expect it to be industrial looking. This facility may be busy during event weekends so it is probably a good idea to call ahead to see if it is busy - 312.808.3161. Note: I accidently discovered that if you go East on 31st Street, you immediately run into the lakefront trail system, which I believe runs into town. That might be good, though, if you are towing bicycles. VERY IMPORTANT: AVOID LAKE SHORE DRIVE WITH YOUR RV, TRUCK, MOTORHOME OR BUS. Although the City has done an excellent job of posting "No Trucks Allowed" where appropriate, you don't want to stray into these areas accidently. The residents won't appreciate it, nor will the local police.