My advice, in general, about your proposed trip to France next year.
Dont pick a venue on the look or feel of a website after all Luke would never win any prizes for the Graviers website would he??
I couldnt find any catch reports for your proposed lake, so to be honest with you I would email them and ask for them... they will, as with any other lake owner worth their salt, be only too happy to provide them. Even be more cheeky and ask them to put you in touch with a couple of their regulars who will be able to give you a full run down on tactics,baiting etc.
We have a Facebook page where we do exactly that and put all our anglers in touch with each other and are, as such, fully visible to everyone.