Well, I discovered that it actually IS possible for me to be pleasant for eight straight hours.
It was getting kind of hard at about the six and a half hour point, when my back started to go. Fortunately, TonyP was booth-sitting with me and I was able to get up and walk around whenever I felt the need to.
The show might have been unbearable without his company and his encouragement. Really. I mean, after eight hours of smiling warmly and sincerely at everyone who wandered within three feet of my booth, I was in need of as much moral support as I could get my hands on.
Painting is hard work. Sitting there next to your paintings, in a high school gym, trying to sell them to passers-by is just the teeniest bit horiffic.