I was there Saturday. Lots of swap stuff, some good deals. I got there around 10, and left around 1:30 or so. Picked up one video, that was it. Lots of people there.
Got there about 1:30, things were slowing down for sure by then, according to the "swappers". Didn't find what I was looking for, but there was a lot of stuff there.
My neighbor used my big trailer to sell some used parts there last year. He said the best time for swappers is from 9-noon or so on Saturday. Sat. afternoon and Sunday are pretty quiet if you want to sell anything, maybe a good time if you want to buy.