There is no doubt that with present day battery types, there are no EV's presently available in the UK where the EV version can match the range of the equivalent ICE car. This means in practice that you have to apply a new approach to towing caravans with EV's. Essentially factoring in significantly reduced towing range, and much longer stops to refuel compared to an ICE. So you can tow today, but it's not the same experience as with ICE tow vehicles. Basically: It's different
Here in the UK we still don't have enough charging stations spread around, And of the ones already constructed there are three additional concerns. The first is the poor provision of chargers suitable for accepting a towed outfit, The second is if the charger is already in use , and thirdly a factoid I read recently which suggests that presently 10% or more of chargers are out of service at any one time.
Add to this the inconvenience of having so many different charging companies, all of whom started out by requiring EV owners to download and set up an account on a smartphone to use their chargers. I believe recently the UK Gov't did require all new public chargers to have credit/debit card payment options just like buying dino juice at any filling station, but account holders may get a preferential cost per unit or energy.
All this means route planning and checking what apps you may need is essential.
This situation is changing slowly, through a combination of bigger batteries fitted to some vehicles, and charging facilities with higher kWH charge rates. However if your car has a lower charge rate than the charger its connected to, the extra charge rate is of no use.
But there are many large scale battery development programmes under way, and some have published working papers and some prototypes which do seem to offer hope of increasing the charge capacity of the battery per unit size, and/or allowing greater range, and some also offer faster charging rates both of which expand the possibility of towing.
I'm certain caravanning will continue to have a future here in the UK, but I expect as the number of EV's on our roads increases, we will see more charging points become available, but I somehow don't think the caravanner is going to top of the agenda when it comes to planning charging sites. So I believe caravanners will have to adopt new procedures to cope with charging difficulties, and there will still be range issues for many users, Consequently I believe we may see the traditions of caravanning change to adapt to the realities of the available facilities both for charging and caravan sites.