Henry, K1WCC, contributed the August Spark Gap article, which is a guide for attending the annual Hamvention.  An excerpt is shown below: 

"The Dayton Hamvention (now held in nearby Xenia, OH) is THE Mecca for hams all over the

world. It's where it's at, as we used to say in the 60's. So what is going there all about? What do

you need to know? I've been there about 8 times, so I may be qualified to report.........."