We specifically prohibit charging of electric vehicles. No campground's electrical system is designed to handle both the load of a 50 amp RV and the load created by charging an electric vehicle. Multiple units on an electrical loop would quickly trip the main breakers cutting power to all the rigs on the loop.
Today, electric cars are not much more than a curiosity piece. If the manufacturers ever want them to become mainstream, one thing they are going to have to do is come up with a recharging infrastructure that does not rely on the goodness of others. No one expects an RV park to fuel up their diesel pickup tow vehicle or their Honda CRV toad and it shouldn't fall upon the parks to fuel up someone's electric car.