I'll be in Civitavecchia on a Monday and would like to catch a bus to either Orvieto or Viterbo around 9 in the morning, to be back in Civitavecchia around 6 at night. Does anyone know if this is possible & what the cost would be? I've been trying to figure it out at the Cotral site, but having no luck. Or do you think it would cost much to get a taxi? There are 4 of us traveling together.