I suspect that the towing argument is going to get turned on its head wrt caravans at some point. Why couldn't you build solar panels to caravan roof, batteries under floor, hard wire caravan to electric car like a Rivian so that the caravan batteries supplement the EV. It would also give you caravan power to an unpowered site or roadside, charge the main batteries at caravan parks for bulk charge and top up from solar panels between parks. You could even regain brake the back axle of the caravan to improve down his control.
