Leaving seat while driving

We changed from a TT to a Class C Jamboree in 1987 and used it until 2004. I believe we envisioned moving about the motor home as one would on a cruise ship, to some degree. I recall us moving about more in the early days--we even took showers. We never had a mishap, but as time went on, we tended to stay seated more and only got up for bathroom breaks and to get drinks and snacks, as most responding to this post appear to do. The front seats had only lap belts, which we used. The dinette also had lap belts, but I don’t believe we ever pulled them out from beneath the seat. I’ve never been able to sleep in a moving vehicle, other than a short nap. The cabover bed was a comfortable place to lie down; the rear bed was too bouncy while on the road.