I go several times a year. There are a LOT of pavilions with many of the new items like jewelry, candles, clothes, etc. I like to look around on the outside areas of the original trade day site where you will find the one pavilion with antiques. You can also find some nice items in the blue civic center building but I don't find much iron in there. Roger is right that some people ask silver weight for cast iron but I have found some great items for good prices over the years. That's where I found my 2800 wheat stick pan.....
Have fun and wear comfortable shoes. This place is big!