I'd just put in a 240V 50A outlet at each location ... cheaper than putting in a hardwired charging station. But it remains to be seen how hard it is to deal with hauling the charging station around. Still, I'd rather have the charging station be plugged in to an outlet rather than hard wired. And I'd rather have a L6-30 over 14-30 anyway, if I was going to do this at the 24A level. Above that, L6-50 is hard to find (import from Japan) and IEC is more expensive (heavier duty, too).
FYI, I've read that a gasoline pump delivers energy at a rate approximately equivalent to 5 megawatt. I don't think any all-electric car is going to reach that any time soon. It's not just the short range (which I'm sure they will gradually extend), but the time waiting for the rapid charge to complete during the trip. Gonna have to be restaurants and motels combined with charging stations.