If you have a second camera body, you could use a wide angle lens which will include sun, venus and mercury, and stars, and horizon with people in front. But you'll quickly see that it is very, very difficult to stay concentrated and work normally when totality strikes. Again, the most important is that YOU enjoy and see the corona with your own eyes, not just on your photos. I think it is more spectacular to see a prominence with your own eyes than on your photo. Of course with your photo you can share the experience - but only in part.
Nothing comes close to actually personnally experiencing totality - no photo, no video, nothing.
Photographing the 1999 eclipse I have to agree with Bob. I was all prepared to videotape the entire event, but when I made my final positioning adjustment at second contact, I realized that my tripod would not allow the camera to vertically aligned. At mid-day a ways north of the equator in July, the sun is directly overhead. I fumbled with the tripod for almost a minute and achieved a rough alignment, but I regret wasting the time. Fortunately, the duration of that eclipse was so long that I still had six minutes of totality despite my foolishness.