I went to this last weekend and enjoyed it. I posted some pictures of Chapin Park on the local pictures thread, but didn't take any of the art tents. It's a very pretty little park.
I think the reason you can't find anything about it for this coming weekend is because they are holding it at Valor Park on the 24th and 25th. I'm not sure if it's the same artists or different people, but I'm planning to go.
It is hard to find anything about this online, but I did find that they have a facebook page/group.
Art in the Park | Facebook