DS was fine on take-off and landing, so I had no need to bf him either time to help his ears - he didn't seem to even notice.
We sat up the back which was good as we could stand up with him without getting in too many peoples' way. He got bored staring at the seat in front for so long - he loved being able to look around from the aisle.
I found the hardest part was check-in at Melbourne - 1 whole hour standing in a queue with DS terribly upset and screaming the place down, and we weren't allowed to skip ahead.
Do you have a HAB or similar? Essential to keep your hands free while doing check in or collecting bags etc.

Have fun - i'm sure it will all be fine!