We recently went on a "caravan tour" in NC. I was told I could bring a carseat, so I did (was amazed at how many people did not restrain their children). The caravan only had lap belts, so I installed our RN65. Boy was I glad I did....there were a few times I almost bounced out of the thing.....all adults were bouncing all over.....DS, however, hardly moved. Rock tight install with just a lap belt.....and the seat was slim enough for us all to fit in the row. DS just turned 5 and is about 40ish lbs.
This is what the caravan looked like with the RN installed outboard (so he could see):
This is what the caravan looked like with the RN installed outboard (so he could see):