I'd definitely recommend buying the guide. In the thread that Mark linked to I was discussing using the GPS coordinates. That was before we tried them. I can confirm they are absolutely brutal, well with the sites we were looking for anyway. It's actually amazing how wrong they are, they actually lead to the wrong peoples front door having followed them through huge gates and sweeping driveways! And if you're thinking people just decided they didn't want us hanging around I can assure you that wasn't the case as on one occasion they even brought us to the correct vineyard about 10 mins away!
I wouldn't let that spoil your appreciation of the scheme though, it's all part of the fun!
Lesson is if you are using the GPS then go as far as the closet village and ask for directions from there, the locals will usually know the hosts by name.
We stayed at 3 sites and they were all very off the beaten track. Didn't meet any other campers at all. All the hosts we met were very friendly and welcoming. There was no pressure to buy their produce but we gladly did and dined with them also.
The only downside was our lack of French, even sites that were listed as English speaking seemed to have very little. It would of been excellent to be able to communicate more as they were all really great people.
Overall it's a fantastic scheme and one which we hope to use again in the future.
