I'm aware of the dangers of checking a car seat, but was wondering if packing a radian (folded) in a suitcase, surrounded on all sides with lots of clothes, might be a reasonable compromise? I'll be traveling with a 5yo, 3yo, and 8mo. 5yo uses a nautilus (harnessed) and the 3yo and baby rf in radians. I don't look forward to that in an airport/plane! I might be able to borrow a ride safer travel vest for the 5yo, and I'm comfortable with the 3yo using the airplane seat belt. Ideally, I'd like to only bring one carseat on (for the baby). Lots of clothes to absorb shock around a carseat in a suit case seems a lot less potentially damaging than any tumbling the (ordered online) seats took in their cardboard boxes when they came to me in the mail! Thoughts?