never had a problem in france camping. but I would advise against leaving $700 in the corner if you hook up with a girlfriend...
but the usual applies, don't take stuff you can't replace. and if you have to, keep it on you (I'm thinking passport, money, cards, camera). this not only applies to theft, but also downpours.
between london and france you have enough time to learn the basic questions:
I would like to eat something
I would like a coffee/

I would like another one
Do you have a room/camping for one person, for one night
Where is the nearest petrol/bank/hotel/camping/etc
a french guy in the UK would get no-where speaking french, it's only manners to do the same there.
really do remember about riding on the right. especially first thing in the morning, after you get fuel, after you get lost, etc, etc.
| | ride -> |
| | ride -> | (on your tank if needed)
| | ride -> |