I have an opportunity to visit my student studying abroad with a friend of mine. Looking to go end of Feb for about 9 days total. Wondering if best to fly into Sydney and out of another place home to US? Or is it better to stay whole time in Sydney and just do day trips? Want to do a 3 day trip with daughter over a Fri to Sunday if anyone can suggest. She is 20 and my friend and I are 50s and one of us has some mobility issues using a cane.