It couldn't be easier to use the Modular EV Power unit from a J1772 plug to a NEMA 14-50, then a common 6/3 extension cord as long as you need, then...
update on the wind farm, I just called. the plugs are always on, never turned off during the months the visitors center is open (for 2013 it's April...
I read somewhere that the Tesla UMC was polarity sensitive at 120 volts... ok, that's not polartity, but neutral to hot sensitive. I have no idea if...