North Vendee - would you stop off on the way back to Calais?

[IHateBadGrammar]

We are going to somewhere around Pornic (south Brittany / North Vendee) next summer, via Normandy. On the way back we were planning on stopping at Paris for a couple of days. Now wondering whether to get a train into Paris and do a hotel stopover for 1 night, then back out again.
We are towing our caravan, so the benefit would be less packing up and a longer stay at 1 site, plus the excitement of a hotel in Paris. But on the other hand, is the journey back to Calais towing a caravan, complete with 2 young DCs, too far to attempt to do in 1 day?

I would be tempted to split up the journey if you have to sail from Calais.

We changed our homeward port to Cherbourg the first time we went to the Vendee, after spending most of the holiday dreading the drive back to Calais.

No, we just tank it back all the way (loos stops, of course!) and then home. But we haven't got a caravan. We tried the stopping off for the night idea a couple of times when the DC were small, and it was horrendous - noone got any sleep, a total waste of time and money.

Ours had CD players and loads of story CD's at that age and it was fine.

dump caravan at cheapo car park municipal site near paris adn do hotel thing

If we went to Paris with the van we would stay at a site on the outskirts. Its just trying to decide which is the more favourable option - I am hoping there is someone out there who has done the same so can advise how they found it!