Don't mess about get proper training your local EMS should be able to help you.
I was involved in a show where there was a back stage medic. Great--no hassle only the knowledge that we had a trained person who was there for us, his advice.
Get a good First Aid book and keep it in your kit read the parts on minor wounds and burns sprains and strains. Don't try to be a MASH medic. Keep It Simple and get proper training--remember there is a legal side of giving treatment.
Submitted by J. Yeardly