There are lots of reviews here: http://www.ukcampsite.co.uk/sites/reviews.asp?revid=3442 - and many more mentions on that website of how people have enjoyed staying at Domaine de Drancourt.
Have a great holiday. The euro exchange rate is poor at the moment, so it would be worth taking plenty of staple foods with you - and then you only have to buy fresh essentials. Buy fuel in supermarkets, rather than on the autoroutes or main roads - it can be a huge amount cheaper. Take a Nationwide debit card as there's no charge for withdrawing cash from ATMs and no commission charges on either cash withdrawals or purchases - so you get every centime!