I called Airtran and know that i can check the kids' backless boosters for free. We are renting a car and will need them. Yes I know I can rent them, but want to save some money and use our own. Question though - they'll be tossed in with all the luggage and arrive on the conveyor belt, etc. I am worried about damage/grime and the fabric covers being destroyed. I can remove the fabric covers, but how should/can I package the plastic bases? Anyone with experience with this? Did you just toss them w/the luggage or did you wrap them somehow. The Airtran guy on the phone was nice but had no suggestions. TIA!