I’m a bit skeptical about it really working on large scales during summer holidays. Aren’t EV supposed to charge for at least 30 minutes 1 hour minimum to be able to get some autonomy? How is that realistic with such a high number of vehicles?

The key is that you put charging next to other amenities like restaurants and rest stops.

You should never really be stopping only to charge your car, you should be charging while stopping to do other things.