Avoiding Rouen

hi, i know this is a same old question. however, we are staying at camping sainte claire neufchatel en bray in the summer, then travelling down to a site near poitiers past tours. i am looking at travelling the slightly slower route dreux evreux etc. is there a route to take that avoids rouen altogether. we are car and caravan. i have seen a longer route down from neufchatel to versailles but dont really fancy anywhere near paris circulars. made that mistake years ago.