I have only been to local and regional shows and they are not usually packed with vendors. What I have observed over the 10 years or so I've paid any attention, is that there is a saturation point. Speaking for myself, I have everything I need to make a hundred quilts; notions, specialty feet, thread, etc. I especially see so much fabric at yard and estate sales that I'm a little saddened. Boxes of quilting and sewing supplies, much of it new or slightly used, still in the box. Sewing and sergers everywhere. A vendor spending $5,000 for a show needs a minimum of 200, $25 sales to break even. To make the usual expected retail profit, that vendor needs 400 sales at $25. Depending on what they are selling, that could be a big nut to crack. Add in all the other reasons given already by other members, on-line sales where no investment is needed, etc. I can see why there may be fewer vendors.