Thanks everyone for responding. Answering everyone in one post, coz I'm like that!
Hartwood Acres is the one place I had already planned to test out. According to WillyWeather, it gets around 7MPH wind, which should be enough. But I've been there (it's about 15 minutes from my house - well within reach), and don't recall that much wind.
If it does work out, I would put it in kitemap.org
And I'm not about to drive to York for kite flying. I mean, sure, I enjoy it, but that's basically the whole day shot driving. The Cleveland Kite Fest sounds intriguing, but I'd have to take my son, and next month he's in school. It'd be a tough sell. [Edited:] The Cleveland Kite Fest is actually near the end of August - 8/22 8/23. More viable.
I've emailed Windstar/Con Engels, but got no reply. The Fly Pittsburgh Kite Club website hasn't been updated since late 2013, so I wonder if he's fallen off the face of the earth or something.