I will be travelling in greek islands in September 2010.I'm trying to do a round trip from Piraeus-Hydra-Poros-Aegina-Piraeus, spending a night at each place. I have found hellenic ferries will take me from most places to the next but I am stuck trying to get from Poros to Aegina. Please help me. If that is not possible, which of these places is worth a 2 night stay? Or is there another place that I should try?