I with my wife reaching HK Airport from 5 march 7.30 am to 7 march 22 pm HK Airport. So I have 3 days and 2 nights for things to do. I want to visit Ocean Park, Victoria Bay Victoria peak, Wang Tai Sin Temple, Po Lin Monastery, Stenlay Mkt, Ladies Mkt, HK Disneyland, and Shenzhen. Kindly advise should I purchase Octopus Card or Airport Express Travel Pass. Which is more economical and convenient for the above period. Is there any security deposit or deduction when I buy or surrender octopus card or Air port Exp. travel pass.Thanks for information.