We are two couples in our early 60's planning a trip to Croatia Sept 2014. Plan to arrive in Split for 7 day cruise along coast (Split to Split). After cruise, would like to rent a car on Sunday, Sept 21 and drive north to stay one night (where/?) and then continue on to Venice and stay there for two nights. Fly back to US on Sept 24. I have seen suggestions to take ferry from Rovinj to Venice (how often does it run, do we need advance tickets). Or bus to Treste and train into Venice (again do we need to plan for advance tickets). Where would be the best place to drop car if not Rovinj? What rental car companies could we work with?