Dagnabbit, yes it is walkable, I'd guess about 10 mins up a hill.
I would not even consider it between May - Sept because in the heat you will be good for nothing when you get up there.
I would ring Murat at the Sundial I don't know weather he has a minimum no for free pickup. He would possibly be able to fit you in the bus with others from Ovacik.
Its worth the phone call food is excellent