Bray Dunes
If I find myself in this area, it's usually en-route back to the UK via the chunnel.
As I travel with my pooch, I always need to get him checked and approved for travel at a local vet.
The local vet is just around the corner form this site, Nathalie Delissen - ask for directions at the reception, but briefly, out of the camp, turn right at the main road and walk around 1/2 mile, her clinic is on the right. In the village.
Bray Dunes is on the France/Belgian border, Adinkerke is the nearest town, perfect for a sack of ciggies and chocolate.
If you treat yourself to a couple of days at a campsite here, perhaps to freshen up and "do the tanks" etc I would recommend this campsite :
Home - Camping Club Perroquet
well worth 20 quid or so for a couple of nights of freshen up/recharge etc.
It is huge but each parcela is also huge, I've never been on a site that gives you so much space. pitches are mostly surrounded by hedges so they are all very private.
It is usually so peaceful there.