When in France I usually avoid driving anywhere near Paris but as we have to get from Zeebrugge to Blois it looks like we will have to. All of the sat navs we have tried, route us on the Boulevard Périphérique through Paris, how bad it this road and what other suggestions are they. A few years back we did try the A68 past Paris but this was very busy and took an age anyway. Note, it will be about midday on a Sunday.
Ralph
Ralph