We are driving from Orvieto to Perugia next week and we want to park in the Piazza Partigiani car park. Does anyone know the best exit to take from the main ring road around Perugia? Is it Piscille or Prepo or another exit? We want to make it as simple as possible, of course, and to avoid getting caught up in the one-way system. Any help would be much appreciated. Thanks.