I did this trip with JY 2 years ago. The visit to Portofino is by boat from St Margherita which is a nice town. Portofino is very pretty, small and very expensive. Monaco and Monte Carlo has more to see with the Palace, Cathedral, Casino etc. Lots of designer shops. When we went we parked at the end of the tunnel used by the Grand Prix and walked through if you are into that. Its a good holiday.