Damien,
Enjoy it.
Either buy or ask Sinta Klaas for a few caravan site review books like the Alan Rogers Guide to Europe, or the Caravan Club Europe book.
In addition to recommendations from the UK organisations, look out for Dutch ANWB or VVV approval - they post more information about sites and facilities - you could borrow my ANWB camp site books but unless you speak Dutch...
Then read and plan your trip instead of watching T{pipe delimiter}V over the Winter break, and don't exclude French municipal sites - some can be excellent - and are good for short stop overs en route.
Robert