we flew when our dd was 6 months old. she wouldn't eat or drink during the landing or take off, but her ears didn't seem to bother her at all, so i guess it just depends on the baby.
don't worry about the other people on board. i worried about that too, but then realized that i had paid for the seats too, so i had every right to be there, crying baby or not!
and honestly, i did get a couple of irritated looks when gianna cried, but they were mostly from the (rude!) flight attendants. the other passengers seemed to love having gianna near them so they could talk to her, talk to us about their own kids, etc...basically i think it helped pass the time having a baby nearby.
i would recommend taking MORE of everything on board than you think you will need though. our flight was 3 hours delayed,
so of course, i ran out of diapers and wipes before we even took off!
just make sure you bring more than what you think you will need.
i'm sure you guys will do fine. have a great trip!!