We did this route last sunday and just followed the satnav which took us on the A10 to Paris, then round the peripherique to the A1, but the A16 would work too. There was a bit of traffic around Paris, but it was a sunday afternoon so can't expect anything else!
We do it completely differently - we store our caravan south of Blois and head up to Chateaudun, then Chartres, Evreux, Rouen, but we use non-toll roads and you'll just want the quickest route.
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