How long would it take in the bus? Would you also recommend renting a car? Our flight back is early on Wednesday, approximately 8am.
The run is 01h50.
You would appreciate renting a car around Sciacca. There's no train station in Sciacca, and only bus service.
You might spend the last night nearer the airport or in Palermo.
If you hire the car, it's important to return the car during business hours when you can inspect the car with a company representative, and secure written documentation of the car's condition.