It, of course, always depends on what is in your game and what you are using.
If using tilemaps I have found it nice to to as you say and duplicate the end part and then move the camera.
This must also of course be included in the gameobjects and their logic.
If using physics (especially dynamic) that could cause some problems though.
I have also done the “world moving style” which is really nice in eg Shootemups. Also here dynamic objects could be a problem. Benefits with moving world is that you don’t have to worry about precision errors for the camera, something you will see, especially if using medium precision for position in the shaderprograms.
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