I have never stopped overnight anywhere except a campground. That is the reason I put up the orginal post. I wanted to hear from those of you that do use other places. I do not like going into a campground late, and possibly waking people.
I live in North Carolina, and it is my understanding that you can not stay parked at a rest stop for longer than 2 hours.
I understand that even though a truck stop would be more noisy, it is probably a relatively safe place to park for some sleep. I guess one reason would be because there is more activity there. I did stop late one night at a truck stop for fuel and a snack. I saw what appeared to be a "working lady" knocking on the doors to some of the trucks there. I would hope that she would not knock on the door to any type of RV since there is usually a family inside.