You could show some relatively small (such as 600x250) images of parts of live sites that you have worked on, with those images showing some parts that you feel

You could show some relatively small (such as 600x250) images of parts of live sites that you have worked on, with those images showing some parts that you feel more responsible for having done, without having done the whole site. Those images would also link to the sites themselves. They would have a small caption saying what you actually did for that website.