We had a great day with Revelation Tours last spring. Our ship was docked in Monaco. We started our tour from St. Paul de Vence, visited Eze, Nice, Rothchild villa - gorgeus place, and finished in Monaco. We had enough time to explore these small villages and we drove along very picturesque roads with many stops. We didn't go to the palace in Monaco and missed changes the guard but we had enough without it.
Michel was a fantastic guide and we would highly recommend him.