I just take down C$ put it in my Safety box and exchange it as I need it at the cambio or hotel for J$.
That way I don't have to deal with the Bank machines - my experience is the bank machines are either out of money or don't work. Also there are always lines at the bank machines and its hot in town.
The only problem is that once you've converted to J$ - the bills seem to evaporate when exposed to the elements.
K3
