Take "establishing shots" of the whole venue and booths with your 24mm. Then take more personalized shots with your 50mm. if people want to pose for you, be creative about their posees. and not just have them stand facing the camera. For really interesting video, use 120 fps (slow motion) for some of the scenes with faster motion.
When outdoors, in the sun, be really careful about blowing-out the highlights (use your zebra's or histogram). Also, get down low for kids, dogs, etc. Pay a lot of attention to busy backgrounds when shooting a subject. I like using just a hint of fill-flash with the sun in the background on outdoor shoots.
Great advice.
I'd just add that the best shots for gigs like this are often the unposed and candid ones.
Folk tend to freeze up and/or pose when you ask to take their photo. The end result is often "wooden".
What works for me is to just be yourself and socialise, then mention that you're gonna be taking some photos.
Most folk are fine with that, then proceed to ignore you when you are snapping away.
If you go down that route (which I highly recommend) be sure to cull EVERYTHING that isn't flattering to the subject.
The end result can be some gorgeous photos of people being themselves, and they will LOVE the results.
I get better results with candid shots.
