I didn't see any wristbands, but I wasn't really looking for them either.
I just don't see the York Meet as an attractive event for those not already involved in the hobby (meaning TCA members in this case). Train events most receptive to the public are those such as Trainfest in Milwaukee and most any Great American Train Show, among others. Those are events where entire families can see trains operating on layouts in various scales and where vendors, for the most part, offer products of most interest to new participants in the hobby. Also, York--the city itself--is not a particularly great attraction to visitors in its own rite with the heavy traffic and confusing street navigation.
