I did a short trip to Queensland when DS when he was 2months old and we were not sure if we should go, even on that short trip. We decided to go and Iam so glad that we did. We had a fantastic time and the staff on the plane were really helpful, let us get on first etc. I think you should make the most of the opportunities you get and just try and be relaxed about it. Go with the flow, that tends to make it less stressful.