I don't think so. The Greek central bank will try hard (at least in the initial few weeks) to limit the devaluation of the Drachma (by buying Drachma from the Forex market). But everything will depend upon the volume of Drachma banknotes which they print. I hope that, at least in the beginning, it will be in small volumes. So it won't be that hard for the central bank, to control the exchange rates.
I dont even think they could print drachma because one the rules to join the Eurozone is for the countries to stop printing local notes and destroy their printing presses.