There's a little bit of everything at those swap meets. I'll probably have a booth up at the one you mentioned. In general you will always find lots of leathers, bags, patches, helmets, biker jewelry, do rags , tons of HD used parts and anywhere from just a few metric parts to a semi decent amount.
You get alot of the same vendors at these things and it realy depends on who shows up. I've got a flyer somewhere for the one you mentioned, if i find it i'll link to it. I also set up at 3-4 events for
www.texasscooter.com a year. There will be a few in DFW from them this year.
SiC
