After receiving some very solid advice on this forum to my question about renting a car for a day trip, we have decided to "ditch" the car idea, and use the train for a day trip. We have considered many destinations that are easily reached by train from Paris, but have settled on Chartres, a 1 hour train ride from Gare Montparnasse. We were going to do this on a weekend, but would like your advice again! For a mid-June visit, would Chartres be over-run on a Saturday or Sunday? Would it be a much better idea to do this trip on a regular weekday? (we could do it on the Thursday). Thanks again for all your help, this is a great forum!