This is a bit of a niche request, so I think I'll be lucky to get any replies.
I am thinking somewhere about 3 hours SW of Calais. How can I find this? We are driving to near Cognac, with 4 children under 7. The cheap and cheerful Formule 1 sort of places don't have big enough rooms (we need space for 2 cots). Also, we'd like a place with somewhere for the girls to be able to run around and get some fresh air so don't want to be in some awful concrete jungle.
Try www.booking.com. Put Rouen in as a destination and the number, age of your dcs, then open up the distance away. A quick search brought up a few alternatives, but I don't know when you are travelling.
This is the gorgeous B&B type setup place we always stay in if it's a car journey- everything is lovely, homely and not sterile without having to pay double for the token quirks and there's a big garden, chickens, trampoline etc....I'm afraid it is actually in Calais or very near. But otherwise it ticks your boxes.