Amiens?

Hi can anyone give us their expert opinion. We are in the south of france at the moment. Our ferry leaves next Saturday afternoon. This is our first trip here and found the roads quite easy to follow although its a long way down. My question is we would like to visit the Palace of Versaille and maybe some time in Paris before we catchthe ferry. I thought to travel to Veirzon the first daystay at overnight site then on to Amiens the next day.Am l right in thinking that Amiens would be inbetween Paris and Calais as will have about four days left and is easy to get to both. And is Calais about three or fours drive with caravan. l would be grateful for anyones advice as, as l said this is all new to us. Thanks Sue