this report has given me a bit of thinking to do about the best way to keep them safe.
You need to bear in mind that the RV seats are not certified to FAR23 standards, you're basically sitting on the floor with a non compliant cushion for comfort, attenuation of crash loads is moot, you do your best in the circumstances taking care of your youngun.
https://www.faa.gov/documentLibrary/...C_23_562-1.pdf
https://www.law.cornell.edu/cfr/text/14/23.562