Palermo to Calamonaci?

Hi-

We will be visiting our newly rediscovered family in our ancestral town of Calamonaci (Agrigento) in October. What is the best way to transport 7 adults from Palermo to Calamonaci for the day? Are there private transport services that we can hire with a van/driver that would be willing to have an English-speaking driver spend the day with us in Calamonaci then bring us back to Palermo later that evening? We need someone to act as a translator as our Italian family does not speak English and we do not speak Italian ;-)

Or are we better-off renting a couple of cars and driving there?

Any advice is greatly appreciated.

Thanks!!