In reply to Wiley Coyote:
For what its worth I've been to Kalymnos almost every October since 2004 and its always busy, particularly in the first couple of weeks. Twice on my visits, including this one, there has been a festival going on but as far as I'm concerned these add to the atmosphere and overall experience.
It was busy this year but there are so many crags developed now on Telendos, the Vathi Valley and further afield in the Palionisos valley that I never had any trouble getting on top quality routes wherever we went.
As an aside entering the marathon competition was great fun and good value for money (Goody bag with contents worth about £75 retail, several free drinks, and a free meal and big party all for 20 Euros). Plus I did more routes in those 2 days than I often climb in a week and that was on the most crowded, popular cliffs - great friendly atmosphere. It could just do with a vets category next year then oldies like me might stand more of a chance. Gil Peel and I were probably the oldest competitors by about 30 years!
If you don't like the crowds go to Kaly in May. I think that is the best month for lack of crowds and more settled weather. However the overall Kaly experience, of which the climbing is just a part is better in October It seems every time I go I meet up with some old friend I haven't seen climbing in the UK for donkey's years.
Just go with the flow and enjoy the complete package Its busy for a reason and that is that so many people from all over the world like the full deal.