In reply to Ed Booth:
My plan for this September, as I arrive around 9.30 is to,stay at ilios and Irene and the hop the ferry just after 8. We did this last year, and were climbing by 10 on our first day. I spoke to someone a few weeks ago, who used to manage Kosovo and Kalymnos for Olympic holidays, and he said it's by no means certain the ferry will wait. Apparently they call the airlines to see how many are booked to Kalymnos, this is packages obviously.