There are several Swap Meets listed in the "Events" section. When I have conducted Swap Meets, I try to include as many RC clubs and fliers as possible....it not only increases revenue, but RC types sometimes have treasure to UC guys....
In NJ, we had a few "regular" vendors that attended....they were great sources for stuff that string fliers like and use, ranging from acid brushes to arrowshafts to finishing materials.
The RC guys all look forward to the GSCB event as they can find homes for their "obsolete" (at least to them) engines and props.
Don't shy away from RC Swap Meets, and if you are holding one, be sure to contact the local RC clubs.
Have fun!