The info is also in the newsletters, which I happen to be the editor of

Both the spring and fall shows this year are at the Clark County Fairgrounds. The spring show is not in the Event Center building, but in a building next door to it. The Fall show IS in the Event Center building. Third weekend of October.
The Salem rental was extremely expensive, and while many of us liked the venue a great deal, there were a lot of complaints about the surrounding area. I don't know if we'll ever be back there in the future or not.