We are planning a trip to Italy over the Christmas holidays and are looking for recommendations for a private guide who could take us on day trips from Rome and Naples. We are thinking perhaps Orvieto and Tivoli from Rome, and Pompeii, Herculaneum, and Capri from Naples. Does anyone know of a good guide who can be flexible enough to accommodate one traveler with bad knees who is slow on hills and stairs? We would appreciate any tips you may have! Thanks, Kim