I agree that is a great age for flying, the less active they are the better LOL....yes it does get harder.
I would take a baby bag with all you need, including purse etc & not a handbag aswell. The extra is sometimes too much & some people are not that helpfull when you look like you are trying to master a juggling act.
I agree take a wrap or two, planes do get cold...otherwise they can get you a rug.
In regards to BF or bottle feeding on take off etc, don't stress too much about it. Sometimes it's not possible if not feed time - give it a shot, or try a dummy but what will be will be. I'm a lucky Mum of a baby who doesn't even flinch....lucky for me as he has flown 10 times in 12months.
If you have a sling or baby carrier that is great for being able to do other things & keep bubs close so should sleep better & then you don't have to put on that silly little strap.
Also ring & ask to be allocated an isle seat, very convineint if you need to take a walk with bubs etc.
Oooh yeah & eat before hand, don't rely on eating on the plane...very hard to do if you are on your own juggling bubs.
Goodluck & have fun.