It is still relatively easy to park a van in France! French legislation is not too strict and the small size of the vans will allow you to go relatively unnoticed. Be careful in some cities, some car parks are prohibited for vans and motorhomes but there is normally a display. It will then suffice to leave the city and find a peaceful and authorized corner. Note that you will be responsible for any VP taken! You can also park in the campsites or rest areas that you will find along your way.