We were there 9/13 - 9/18 of this year and love pin trading. Cast members are not currently trading, but there are pin boards in many park and resort shops. Since their location is sometimes not obvious, I would recommend asking CMs in the shops if they have a pin board and where it's located. We were skeptical about how the pin trading would be this year because when we were at Disney in 2018 we weren't too impressed (saw many of the same pins on every lanyard/board), but we were happily surprised by what we saw this year. In summary, definitely bring some pins to trade! Have fun!