I've finally seen an EV that will do all I need - at least read the press releases of the Audi Q6 e-tron.
In Audi's IC range, the Q5 was too small and the Q7 too big for my specific needs but the Q5's electric replacement has gained space by moving the wheels further apart - with a 388 mile WLTP range and 270 kw charging it looks usable for my solo day trips - and my long-distance towing trips as long as EV charging points start to take into account the space needed for vehicles with trailers as I'm absolutely not going to leave the caravan somewhere else to charge the car.
This is a brand new platform, PPE, shared with the Porsche Macan so I'll wait a few years to let them get the teething troubles out of the way and then make the switch, that's if I'm still driving then!
https://www.autocar.co.uk/car-news/new- ... and-510bhp