No one mentioned AI SERVO mode.
If your subjects are moving perhaps you should be in this mode.
Go with the widest lens opening (smallest number f stop) you have, have all focus points active, go with a high ISO (noisy but sharp is better than out-of-focus smoother) and consider using a monopod if allowed.
In post-processing consider using noise reduction selectively, perhaps going to the channels if you have photoshop or other applic. that allows that.


