If your purpose is to educate people about the daily casual wearing of kilts, then I would stick to that; your message may get lost behind whatever else you have.

I would search out pictures of people wearing them in obviously casual fashion, like Graham's work pictures, Derek's kitchen shots, and people at work and school, show a wide variety of types (trad., UK, STW, RK...) and blow the pictures up large enough to be seen from 5 - 10 feet away. They wouldn't have to be photo quality, just good enough to clearly see what they are.

Have some cards from the various kilt makers, as well as a stack of pages with the names, web sites, contact info, and price ranges of each, all collected on one sheet. ...and maybe print this on the back, as well as having a pile of them, cut up ready to hand out alone.

Have Graham make you a banner of the XMarksTheScot.com logo at the top of the page here to hang at the front, over your table.

Grab a beer and a chair, kick back, and answer any question people may have.