A renaissance fair is a gathering of people who are re-acting the Renaissance, a period of religion rediscovery. It mostly consists of knight. Alot of people go their to eat traditional food, and get...
Get a long skirt, a blouse with puffy sleeves, and a lace up vest. These need to be in basic colors if you want to look authentic. EBay has a section where they sell/bid on items made for Renaissance...