hey love- we did the gold coast trip with twins when they were 5 years old
we hired a car- way to hard to get around gold coast without one and the kids in tow
got a car through europcar for like $28 a day so cheap as
also pays to get the car insurance here b4 you go through racv and that way you dont have to pay the extra for the huge excess thingy they try and scare you with
you can take car seats with you or i actually hired a car with 2 seats as well- it was only a couple of bucks extra a day to do so- they also installed them but i definately had to check them b4 i used them
even just hire cars for days you are not a seaworld and for the airport shuttles
it worked out cheaper to hire a car for us than use public transport to get around everywhere
xxx