It was certainly after 1992 which was when I started. The beer tent was still on the old SOS property and the Shifflebeins had corn and brats for sale on the corner of their lot. The SOS brothers had a big sign for a few years protesting the EAA land grab. I suspect it was gone by 2000 but my memory is hazy. If you remember the old forum tents, then you predate the landgrab.