Re: the stickersI'm assuming that everybody reading this will either have a participant button as a performer or volunteer, or they'll buy at least one of the buttons that help pay for the festival. So you'll have something to stick the gold thingy onto.
It's not a special gold-star badge, it's a sticker for whatever badge or button you already have.
It's not too late to volunteer (and get a buttton). http://www.nwfolklife.org/P_F/Volun.html, or telephone 206-684-7300. Or go to the third floor of Center House during the festival and they'll sign you up for a volunteer shift.