All of the above advise is good.
I would take one additional step...2 days prior to the show take some quiet time and with a personal electric trimmer do a bit of grooming. Clean up any hair around the shaft, trim the pubic hair just to the point where the shaft joins the body. Keep it somewhat narutal. And as stated maye a half a little blue pill, chew it, that will cut the reaction time of about an hour in half. For better measure do a "dress rehearsal" one day prior. That is what a professional would do.
Good Luck.