I went year before last.
It was 98% goldwings and cruisers.
I saw 3 other fjrs though.
There's not a whole lot at the event other than demo rides, vendor booths, and a few show bikes. If you want to do a demo ride, you pretty much have to sign up early the first day for anything good. If you're planning on buying anything bike related, but not FJR specific (apparel, tires, etc) there are some good prices to be had, and all the tire companies have changine booths on site.
If you come down to the area, give 'us a holler!