Barcelona -- Nice: quite a few hills on the way
Yes, France is a great country to visit, usually. The situation has been quite different during the past few months, however. French people have had to carry a document justifying why they were out of their home, recreational cycling was forbidden, etc. Fortunately, strict lockdown is now a thing of the past but the situation remains unclear, even for the French themselves. From what I gather, camping should be relatively easy. The advice is to call in advance, quickly followed by the statement that wild camping in France is legal. Finding food in grocery stores should be easy as well. Eating in restaurants, not obvious.
One issue, rarely addressed (anywhere btw) is restrooms. This "service" was usually offered in exchange for the price of a coffee. Today, my understanding is that several restaurants sell takeaway food only i.e. w/o access to the restrooms. Touring could become a lesson in self control