OK, odd question... We are flying with a group of 15 on AirTran. We have pre-purchased the seats near the front that include priority (zone 1) boarding for all passengers. We're hoping to upgrade at least some of us to BC at the 24-hour mark. My sister is flying with her infant daughter and has never used a car seat on an airplane before, but I have. In fact, I am the only one in our group that has secured my kids in a car seat. I'm wondering....if I am one of the group that is upgraded, will I be able to go to her seat (in coach, row 14) and install the car seat for her so that it is ready when she boards? My DH will be able to stow my luggage for me and get our kids (ages 8 and 6 with 4 previous flights under their belts) situated in our seats so that is not a concern. IIRC, the BC passengers and zone 1 all board simultaneously anyways so it might be a moot point.