After Giveny we decided to head to a campsite we'd used many times before in the forest east of Paris, called Les 4 Vents. It's a lovely site, with big grassy pitches, and a nice place to relax for a couple of nights. Other than some grocery shopping and some walking locally we didn't do much else while we were there, and decided to give visiting Paris a miss this time as we've been before many times.
While a very nice site it was noticeable that at nearly 30EUR a night it was about twice the price of the others sites we'd been using for most of the trip - with only the site in Biarritz being more expensive. It is worth it though, especially if you've got kids and planning to visit EuroDisney.