Been to Kefalonia in May and did manage some time on the nudist beach but sea very cold and cool at nights.Only been to Corfu in mid summer but from experience the further southin the GreeK Islands(ie: crete) you go in April/May the better or hotter the weather
thanks for that its a lot of reading,lots of nudist beaches,harder to find clubs or bars ..even swinging couples...but we did find something very interesting in crete by chance .