I love quilt shows too, I go mainly for the quilts but the vendors get my attention too. It's a nice chance to try out or ask about things I've seen in catalogs but didn't quite understand or see the point of. Sometimes I STILL don't see the point after the explanation, LOL.
I was disappointed last year at the PIQF, I wanted to buy some larger BlocLoc brand HST rulers but they sold out before I got there!