At present the infection rates in France are way below ours. The NHS app is valid for entering the country and you can download the "tousCovidApp" and transfer your NHS QR code to that giving you the ability to enter events or some campsites. Fairly straightforward to do. Entering France is on the double dab NHS information, either on your phone or printed out and the only other document is an attestation that you are not displaying Covid symptoms, the form is available on ferry websites. My theory is I am liable to meet less people in France in the van than at home where you tend to see friends and relations. The only enforced interaction will be shopping and in general the smaller village / town supermarkets are far less crowded than ours so mask up up and slap the gel on. I feel this is how it is going to be for some time and you need to make your own mind up on what you feel comfortable with. Heading off shortly to France, the only difference is keeping a close eye on the news regarding any travel traffic light changes, have delegated a friend here to update me with anything that looks tricky. Cabin booked on ferry both ways and liable to be fairly low passenger numbers anyway, this is Plymouth Roscoff route.