I also went Saturday to the Greenberg Chantilly show. Not the largest show but a good one with a good mix of books, layout building stuff, all guages of trains, railroadianna and toys. Lots of stuff for the kids, even the little ones. Very nice layouts, train races and a ride where the kids got pull themselves around a track. A great thing for parents and grandparents to do with their kids.
Got a couple of K-line items I had been after for several years and at very fair prices. I always like to support these shows because it introduces the public to the hobby, especially young people which the hobby really needs. Also, I very often find things I never expected to find -- like yesterday. You never know what will show up. If you do not support the shows they will go away.