Actually the flight to Sydney was pleasant and customs etc was relatively painless (cleaning the tyres of the trike being an essential ingredient for this). I've also showered and gotten into new clothes (and this is but one of the many reasons for my being a member of the Qantas Club).
However I've already been up for about 14 hours and I've still got a 4-5 hour flight to Perth plus a taxi ride with the trike in tow to come...