-- I suspect you mean on a "per million" basis rather than in absolute terms. AFAICT: the UK death toll is currently around 500 deaths per million. The Roseland Peninsula has a population of less than 4,000 so more than two deaths would put it above the national average and it wouldn't take many more to make it a black spot!Last time I looked the Roseland peninsula had one of the highest death rates in the country, certainly a lot higher than where I live.
I note that this thread started after the new rules were published: We are now allowed to drive to beauty spots not just for exercise but also to admire the view etc. AFAICT, the law doesn't restrict any particular vehicle type -- so you're just as free to use a motorhome for this as you are a car IMO. Pragmatically, you're probably safer with a motorhome than you would be with any other vehicle because you have all the facilities to hand without needing to step outside. However, you're only allowed day trips and hence wild camping is still off the menu.Absolutely, they bring their germs with them from wherever. But a Cornish resident going to Cornwall is doing no more and probably far less than someone driving many miles to their favourite golf course.
Pragmatically, the OP is correct -- they would not be a threat during a three-day excursion provided they didn't interract with others. However, the rules were probably drawn up without taking us into account. I have to ask, "Why would they?" considering the campsites are all closed and the Caravan Sites and Control of Development Act 1960 makes wild camping a quasi-unlawful, grey area!