Leaving on a jet plane

Im coming to the end of my time in South America (just got Iguazu falls to visit) and I have to say that I'm not feeling particularly sad about leaving. I wish I could say that living here has been a learning experience (and I'm sure I have learned some things) but the truth is I believe I've just become more impatient and intolerant. Maybe I'm just getting old and this would have happened wherever I was but...

Anyhow, tonight I have a sixteen hour bus journey (but with a fully flat bed) and then three days of exploring the waterfalls and a bit of the jungle. My big question is what should I do in Australia and New Zealand? I have some ideas but I'm open to suggestions.

Finally do any of you know anyone in Australia who would be willing to store a couple of bags for me while I wander all over their country? (just hoping).