We fly out on Saturday! Airtran says one carry-on and one personal bag. Can the three ticketed children each bring a school backpack and a carryon rolling suitcase? I checked dimensions and the carryons are within limits. Airtran.com doesn't specifically spell out "backpacks" as a personal item, but they do list examples like a laptop bag, purse, etc. Ok, or not ok to have backpack as "personal item"? That's the question! Thanks!