Dennis Valencia
Google
Rottnest island is a nice place to spend the time for beach, viewing, biking and exploration. However, the short day time they operate for the day is not enough. The last trip of their bus commences at 3pm, otherwise you can't go back home for ferry. Hence, your only option is to stay in the island for a number of days to enjoy and explore with friends. A single day is not enough, especially with their operational time.