Kaydee - I think you'll find they won't let him sleep or play on the floor. I know the aussie airlines can be very particular about kids playing around on the floor and definitely no sleeping. No particular advice but to say I did it with a 8 month old and it wasn't too bad. If you are expecting a kids meal or baby food or anything, confirm reconfirm and reconfirm cause no matter how often we got it confirmed when it came to the flights ours weren't there. True the bulkhead seats do have fixed arms so if you don't want the bassinet even just having the ability to lie across your lap and onto a spare seat. Ask at checkin whether the flights full and if not ask them to block a seat beside you (sometimes they don't think of these things).

Good luck with it all Will come back if I think of anything else