Have been thinking about this for a while and have decided to do it next summer.
DCs will be 16 and 13.
We can take 3 weeks, and I would like to break the journey up by making the first stopover in Singapore. We have friends there with whom we can stay for a couple of days. On the return journey I want to go via San Francisco, if poss, as I've never been there.
We also have friends in Sydney, so some time there will be essential - but apart from that the rest of the time I'm not sure about.
We'll be going end July/early August.
Any tips/experiences very gratefully received!