Don't forget lunch, & a chair. Find out where it held at before the day of, take enough change with you & have a buddy or relief n case you have to go to the bathroom. this might sound petty, but all of them are important. I've doing a vendor fair soon, after many years. Just watch your merchandise &your cash, & purse if you take one. A fanny pack would be a good idea & dress for the weather. Good luck.