In reply to stp:
There´s a campsite at Kinouria about 15km away but it almost certainly isn´t open then. You need a car (and a credit card) or use the taxi service. There is an occasional bus which groans it´s way over the mountains to Sparta if I remember rightly.There are banks,pensions shops and tavernas in Leonidhion.
No idea about the crags developed, I only climbed on the big cliff opposite the town.
The weather depends on how high the crags are, up the top of the gorge you´ll still be at the snowline in late Feb. It´s the rainy season as well.