Travel to Oz with two under 4 - madness???

[jacquiaki]

Hi all

DH and I are thinking of flying to Oz in April, DD will be 3yrs 1 month and DS will be 17 months - any advice for managing the flight, choosing seats (bearing in mind we will only have 3 between the four of us), dealing with jet lag?

Are we just mad???

Thanks, Jacs xx