From postings it appears that Gare Montparnasse would be a convenient pickup point for our rental car, but I want to check with those who know. We are leaving a hotel near the Sorbonne about 9am Mon, and will be driving to Normandy. We will be returning early the next Saturday evening from Chartres to a hotel at Place de la Republique. For obvious reasons I want to avoid driving in Paris as much as possible, so is this location a straight shot out of and into town? I figure we can take the Metro or taxi's to and from the hotels. Is this reasonable or are there better choices?