Am starting my search and looking for some good recommendations. Found les valades from reading this board last year and loved it, so am starting a thread. 
Previously, been to Normandy and Brittany (kids younger, liked the shorter drive times, but would like better weather). Loved Benodet though.
This year, drove Caen to Ile de Re, 5nts on fab municipal site right on beach, 5nts at les valades in Dordogne, then 3 nts near Nantes on way back to Caen. Loved the sites (except one near Nantes which was too big, but wasn't a problem). Too many driving days, not enough time in each destination BUT we only have 2 wks for holiday this year and not sure 1-night stopovers would be a lot better. Weather could have been warmer. DCs will be 8, 6 and 2 in Aug 2016.
Our restrictions
DD has significant medical needs.
Must have EHU (medical fridge, charging medical pumps etc)
Can't do short stopover, DD needs 12 hrs infusion overnight, so quick stopover to break journey not good for us
Can't drive all through the night, due to DDs medical needs
Must cross on Portsmouth ferry
Can't take a plane, so this is our chance for sunny holiday
Our preferences
DH likes beach and possibility of sailing (as do dcs)
I like seeing somewhere new, landscape, chateaux,food etc
Walking distance to town good, but not essential. Swimming pool/on beach desirable.
Massive holiday camp site (600 pitches +) is a bit too big for us
Considering taking the Portsmouth-Santander or Bilbao ferry, then staying in 1 or 2 sites on the coast there. It's called the green coast. Anyone been in August. Is that costly ferry going to get us better weather without all the driving we did in France or do we need to go further inland Spain for that?? What are the sites/beaches like? Are the picos de Europa fab, is there lots to see in the area?
Otherwise, sticking with France, would the ardeche for example give us better weather than Dordogne and if so, can anyone recommend any sites? Anywhere else, Annecy, Jura etc? Med coast, but just too far?
Thank youuuu