Pete, you can usually see one of these running right here in NC every year:
http://www.farmpark.com/southeast-old-threshers/If you've never been, you should go. It's an antique gearhead dream. Old hit and miss engines running, huge steam tractor driving around, and nearly every kind of farm tractor you can imagine on display. Some old car and truck stuff, but also lots of cool demos of things like axe handle lathes powered by tractors, etc. And fair food. Other than stifling heat, what's not to love?
Oh, they even have a decent full size train ride for the kids. And those of us who still wanna be.
--Donnie