We once flew with 2 lap infants with Qantas from AUS . They allowed all of us in the same row with bassinet. Was not easy...
We have only ever flown with a single stroller as my mom owns another single so we use 2 singles. Never flown with a carseat either. I do know they don't always give you back your stroller at the gate so I would recommend a baby carrier.
Probably the most annoying thing is because its bulkhead the armrests do not move so your older kid will not be able to lie on both of you. We sort of tried to hide my daughter under the bassinet with a blanket hanging off the side of the bassinet to hide her. From experience some stewardesses turn a blind eye and some make you wake up the kid and move them

some really bad ones actually wait till you wake them up and move them so you can't just say 'yeah,yeah' and not do it.
I would recommend you bring a dvd player for your older child plus put things/games they like on your ipod. Also bring some small electronic toys. We have two of this toy and the kids love it
http://www.amazon.com/Baby-Einstein-Take-Along-Tunes/dp/B000YDDF6O/ref=sr_1_1?ie=UTF8&qid=1346198118&sr=8-1&keywords=baby+einstein. You would think that it makes so much noise and it will disturb your neighbours but the engine noise is really loud so only the person playing with it will be able to hear. Things that take ages to eat eg. cheerios, raisins, those tiny cookies in the yellow bags, twinkies are perfect for takeoff and landing.
Try to nurse/give formula to baby on descent. Pacifier works well too.