Many states do not allow prolonged parking in a rest stop. I've seen as little a 2hrs permitted. I was kind of surprised to see in my travels places that did allow for much longer periods!
Even when vacation time used to be limited, a solid nights sleep is critical to my safe driving. So motels/campgrounds it always has been. And now, it is even more pleasant, since we can take the time to setup, cook dinner, hang outside the trailer in the evening, chat with other campers,etc. before hitting the road the next morning.
