I suspect most owners would be better off in a B&B
I hate staying in B&Bs, and I like staying in caravans. You can’t hang around a B&B all day or even part of the day, chillin out in the sunshine with a barbecue and cold beers etc. Plus a caravan is full of your own stuff rather than some naff old people’s junk like you get in B&Bs.
Not to mention the fact that you can cook your own food in a van, whereas in a B&B you have to find a pay for a restaurant, which is not only expensive but time consuming. B&Bs not really an alternative to caravanning, for me.
Re small campervans – useful, yes, but they are incredibly pokey compared to a caravan. And they need their own tax, insurance, maintenence and servicing etc.