Ok so next spring my buddy is getting married in the Gold Coast and I'm planning on going with my girlfriend for 11 days. Flights to Gold Coast are around 1500, so I'm looking at doing a flight to Sydney for 1k, then to Gold Coast from Sydney for $100. We would like to see the great barrier reef, and maybe some more wildlife fun I'm sure she would love Koalas and other cute goofy animals. My main questions are:
Should I spend time in Sydney? Is it worth spending a day walking around the designated walk around areas like the harbor and Opera house? What else should I check out there if I do stay for a day?
I am concerned about driving on the other side of the road, is it hard to get used to and should I even bother? I feel like my options will be severely limited if I don't, how true is that?
What's up with the Gold Coast and give me some things to do there since I'll be there for a good week.