We had no problems fuelling the camper on the way to Somerset despite no fuel around Chichester where there seemed to be a typical city folk panic going on. Only place we saw a closed garage was Morrison’s in Glastonbury. As the van can carry a fair bit of fuel, we returned home a week later, quite relaxed, and still with a 1/3 of a tank left.
I’ll probably keep a couple of the 20l cans full, but that’s more for my own convenience and laziness than anything else. It’s handy not to have to drive to go get a half tank of diesel, makes a lot of sense really.