My brother and I have four days between work trips to Milan and Paris and we really wanted to visit the south of Italy. However we've always been confused whether this would be possible in 3.5/4 days. On one of the forums I saw someone suggesting an itinerary wherein you make your base in Sorrento and do days trips to Pompeii, Amalfi and Positano and the last day to Capri. Is this realistically possible? Also would it make sense to stay all four days in Sorrento or two days in Sorrento and then two nights either in Positano or Capri? Any ideas/suggestions would be highly appreciated. We like old towns and the beaches mostly but Pompei looks like a brilliant place that we are keen to visit.