Actually, that Ford is probably the most viable EV camper I've heard of. According to Wikipedia (
clicky link):
In November 2020, Ford announced the 2022 E-Transit battery electric cargo van; key specifications include a 3,880 lb (1,760 kg) / 487.3 cu ft (13.80 m3) maximum cargo capacity, 68 kWh (usable capacity) battery and up to 126 mi (203 km) range, based on the US EPA Multi-Cycle Test (MCT) procedure.
1.76 tonnes payload when empty would probably permit a half-decent interior. However, the maximum range has been reduced from 126 miles to 108 miles by adding an interior and will no doubt further reduce when fully laden. In real world terms, I suspect that'll end up meaning a recharge every 60 miles or so, and you'd probably spend as much time on charge points as actually driving the thing. That said, if 'they' can manage it (e.g. if the van has 'bi-directional' charging), you could get away without gas or diesel for heating and cooking as the main
battery could easily supply enough for a day while leaving enough range to get to a charge point...