What about getting a lighter convertible seat and car travel vest or inflatable booster? You could have the five year old roll a carry on in the airport while you front carry the baby and wear the car seat like a backpack (just loosen the straps enough. The five year old can sit in the convertible on the plane. Then, when you arrive, the baby sits in the convertible while the five year old wears the car vest or sits on the inflatable booster.
9/25/12 at 3:03pm