In my opinion, no. I've never found the trading at the tables at Epcot worthy of lugging pins into the park. Instead, I think your time would be much better spent going on ... and I know, being a pin trader, this might come as a surprise to you ... these things called attractions and, since you're in Epcot, walking around the World Showcase and visiting the different pavilions. I would bring a pins for trading onto cast member lanyards, but that's about it.
I think that, with Test Track still being down, people either will visit other popular attractions (Soarin' and Mission: Space come to mind), walk the World Showcase, or will just go to another park. I don't think they'll default to pin trading at the tables, sorry, especially since I think those most likely to be at the tables in the first place are locals.