My advice to anyone driving in France is to carry some cash- say £300.00
because if you pick up one of the "on the spot fines" ( typically £60 to
£120) and you only have a credit card you are likely to be driven to a cash
machine and then left to make your way back to your car. If you weigh this
up it could be quite a proformance and very inconveinient. I dont know what
they would say about not having a licence with you but as long as you have
oter identification how bad could it get?
Take care and enjoy yourselves. David