Hi, this is a message for Cath Wohlers. I've just spent two weeks in Skala and would say that a car is an absolute must. The bus service isn't great I don't think (although didn't us it personally). Try Greekstones rent a car.
I have just returned from a two-week holiday on Kefalonia in Skala and it was wonderful. We hired a car (from Greekstones) and toured all over the island visiting all the resorts but can safely say that Skala was the best resort. The beach isn't very sandy - a bit shingly but other than that the place is first class. The tavernas are great and locals are very friendly. The weather was amazing and so were Monica's cocktails! Skala even has it's own tommy train running along the beach - choo choo! Fantastic!