My wife and I will be arriving at Schiphol about 9pm in July for 3 nights. We'll be staying at a hotel in Haarlem. I'm wondering what my best options are for getiing around. We'll probably take couple trips into Amsterdam (via the train) and maybe out to the beach. We might need the trams while in Amsterdam as well. Should we just pay for transport as we need it, or are we better off each getting a OV Chipkaart? Would the OV Chipkaart be usefull gettiing us back and forth from Haarlem to the airport? Can we just hop on the trains with a OV Chipkaart ?