Many thanks for your info, but I have further questions and hope you can give me the advice:
1. local tour will pick us up from Gold Coast hotel at 7:30 am and take the shuttle ship which departure from pier at 10:00 am. For the return journey, they said that we will take the shuttle that departure the island at 4:00 pm.
1a) If according to your suggestion, where should we keep our lugguage, should we bring all our lugguages to Moretan Island ?
1b) How long shall we travel from the pier to the domestic flight air terminal ?
p.s. thank you for your reminding on the car rental, but i purchased the package which includes the transfer. Anyway, i am still considering whether we will drive in Gold Coast.
Many many thanks for your further advice by return.