In reply to Tigger:
The drive is easy. I'd say actually impossible to get on the wrong side of the road until you are off the main roads and on the way to chorro. And by then, they are pretty narrow anyway so it is no different to driving here on a country road.
There is nothing in chorro apart from a station, a cafe and a couple of restuarants. Certainly nowhere you can get a moped or quad bike. I've never seen either in chorro.
In any case, if you are worried about driving, don't get a car. It is useful to get to desponlandia (spelling?) but if you are going in the dead of winter it's absolutely baltic up there so best avoided. It was pretty much unclimbable up there 10 days ago. Spend the whole week at Makindromo if you can deal with an hours walk daily, not to be missed.