Arriving at 7am by ship on December 5. Looking at booking from Dec 5 to Dec 8 as flight to Melbourne leaves at 5.45pm on the 8th. Will 3 night be enough to see the main sites or should we leave on the 9th? Have been previously to Sentosa Island and Universal studios so no need to revisit. Would like to do Marina Bay area. the flower domes, China town and the zoo's. Any advice would be great!