1000 people showing up sounds like a small crowd for a pinball show. I'm confused why you think vendors wouldn't want a big turnout. A big turnout is good for vendors and good for the hobby. Shouldn't we want the next generation of kids playing pinball? Just sounds like they need to figure out how to to admissions better so there isn't such a big line.
We promote the Northwest Show to the general public, heck we have a kid's zone and facepainting, there is nothing I love more than seeing a bunch of parents getting excited about my games that are there and teaching their kids to play them. I have dozens of photos over the years of kids throwing down on my pins and vids at our show and other events we do the classic arcade for. I love it! I get it if you don't like kids, but most are gone after dinner time and the evenings at shows tend to be a lot less packed.