Rural France is about as safe as you will get. Don't just take my word for it.
Englishman Geoff Husband and his wife have been running a traditional type cycle touring business in Brittany France for 27 years. I was a customer of theirs and stayed at their campsite on a number of occasions.
In all that time not one of our customers has had anything stolen, despite bikes and valuables left unattended for hours. In fact every year we get told of wallets or cameras forgotten in bars or shops being still there hours later.
http://www.bretonbikes.com/brittany/...cling-paradise