We need to get from CDG to Chartres on June 23rd and this day is listed as a train strike day. I am unable to find any intercity bus line that does this trip and Ouibus doesn't go to Chartres anymore. No train, no bus, no airline, too far to walk --- am I down to the option of renting a car to get there? Any other options I haven't thought of yet? My confidence in driving there myself is not the greatest.