Driving in France is like driving in the UK / just on the other side..
We go everywhere with both Series and Defenders and prefer the RN´s. Less stress, more to see and the voyage is part of the whole thing..
Speedlimit is to be obeyed, HiViz vest per seat compulsory, as is the warning tiangle and the analyser. Bring 2 as you need to carry one and once the 1st one is used you still have the other one. Fuel off AutoRoute / Peage / is cheaper and most supermarkets have 24/7 card operated fuel. CC usu works.
Please bring your green card as proof of insurance, the logbook and your drivers licence. Don' t laugh, we have loads of clients who forget things..
Enjoy