Hey there.
We had our first trip on a plane not too long ago. We had plenty of snacks, books and small toys. ANything that is special to them that you know will calm them down.
Also lollipops (sugarfree if u prefer) for take of and landing as the sucking stops their ears from hurting.
Also it pays not to be to worried about what others think. If bubs is noisy or crying its what they do people need to accept that