In case you haven't been on a long distance train, it is not like the NE corridor and other SD routes where you can sit where you want. You sit where you are told and the employees in my opinion, force passengers to crowd together so if you are on the Crescent going from NOL to ATL or in between you might all be put in one or a few cars with the remainder running empty or reserved for passengers going a longer distance. Similarly, at the rest of the stations, your car assignment varies depending on where you are going. I believe it is as much for employee convenience (not having to maintain multiple cars) as it is for any other reason because I often see nearly full cars and completely empty ones when there will be few, if any, new riders as the car attendant is still putting people in the fuller cars. For example, I've seen people going north from Richmond being put in fuller cars even though a few stops later, at Washington, no more passengers would be boarding (before they changed that).