We are going to be travelling to visit family for the holidays and will have to fly and then rent a vehicle and drive for a couple of hours to get to our destination. We have an almost 7 year old ds, a four year old ds and a 9 month old dd. What to do about car seats? I definitely plan to bring the baby's seat, but don't know whether to check it to save hassle (as my dh wants to do) or gate check it to reduce risk of damage (like I want to do). Also, should we bring boosters for the boys? The four year old weighs the same as his older brother and is big enough to be in a booster, although he still rides in a car seat. His car seat is way to heavy to lug along. My dh thinks we could bring ds1's booster for ds2 to sit in and let ds1 ride with a seat belt. I don't want to do this, but also can't see lugging an infant seat and two boosters to the airport with everything else we'll have to bring (plus we'd have to buy another booster). I've looked into renting car seats and it seems pretty iffy. What would you do?