Go to Friendship. Wear decent walking shoes, have shorts and a light shirt if the weather is hot and humid and spend at least two days there, three or more if you want to take in the flea markets not associated with the NMLRA but located next to it.
In recent years I have noticed that some of the vendors start leaving after the first weekend, but traffic on that first weekend is pretty intense so I try for Monday. Make sure you walk through the primitive area, if you are a member and need powder you can buy it there.
You might want to check the website for classes or seminars that interest you, you usually have to pre register, but if you want to make a shooting bag, scrimwsaw, a self-bow, etc, this is an opportunity to do so. Lectures and presentations are often offered also.
It isn't what it was in 1979, but it is still very good, and well worth the trip.
added: The big events are the Spring (in June) and Fall (September) shoots, there are other, smaller more specialized events throughout the year. Go to the Spring or Fall shoot. I bet you'll make time to come back again.