New to RVing, concerned with safe traveling

we travel regularly with our 4 year old grandchild and have been doing so for almost 3 years. She sits in her car seat at the dinette. She can color, play with small toys or watch a small screen DVR Player. I added 3 point buckles for the car seat plus use the regular seat belt for a 5 point hook up. She's more secure here than in our toad. She doesn't have an option like sitting in her bunk while we are on the road. We stop every 2 to 3 hours and let her stretch her legs. We do 10 hours per day and she is a terrific traveler. The key is she knows grandpa's rules on the road are non-negotiable. Buckle in your kids- you'll never forgive yourself if you don't and there is an incident.