I shoot in big crowds, the bigger the better. I use a rotating panoramic camera up a 3 metre pole and fire it with a remote. No viewfinder of course.
Once you've done a few of these and figure what the camera does and doesn't see the results can be spectacular. The camera is highly visible but I never let that worry me, it's the results that count.
I developed the whole system by imagining what a finished print would look like then building the bits I thought I'd need. It took some time to get it right. Don't be afraid to experiment.