Originally Posted by thadocta
... I like the idea of shoving them in the OHL bins - the 11 year old might be a tad big though.

...
Surely not that big though. Just wait right at the gate until boarding commences; use your status to be the first to board and toss em up into the empty OSB's!
IME Qantas preallocate groups across aisles so get to the aerodrome early.
The 763 should be a POP; however a bit more thought for the 73H. I'd go for A/B's seats in two consective rows. If the flight's full you might find this a bit tough though.