Tasdoc said..
I actually stayed at one of the Beachport's caravan parks for a few days in January. It was around Australia Day, so they did not have any cabins available, stayed at a powered site and slept on air mattress in the back of the car. You can charge an EV from any power point really. The good thing about caravan parks is that their power sites give 15amps rather than normal 10amps. So I was getting 15km per hour or about 150km overnight, which was more than enough for my day trips to the lake and to explore the area. The best thing about camping in an EV is that you don't need to run your engine to use climate.
I agree that looking at the map doesn't look very promising, but what you're missing is that the number of fast charging stations has pretty much doubled over the last 12 months and I'm pretty confident it will double again in another 12 months.
AFAIK, there're no EV vans with a good range available at present. Vans tend to have aerodynamic efficiency of a brick, so making an electric one is a bit tricky. I have a Cybertruck on order, hopefully getting one next year. I think it is the closest that you can get to being a "nomadic windsurfer" with an EV atm
Very interesting.

I assume you were able to accumulate enough charge to get full range for the trip home over the few days there?
I can see the advantage of the EV for the retired windsurfer in the idyllic (unicorn?) location being sought as per the OP. Commuting short local distances is perfect for that with recharging at home.
Alas, I think it will be beyond my time when EV's make sense for the retired, nomadic travelling windsurfer who wants to follow a forecast 600-800 km overnight and take all his gear and house with him.

I think I will be consigned to burning Petrol for as long as I can continue to do that.
On the other hand, for the Grey Nomad, it is conceivable that if their typical pattern is to move short distances and only every few days, they could do that in an EV Motorhome, or towing a caravan with their Cybertruck.