I have started packing around a large pad of paper, 16 x 14 inch, when I go sketching. This tends to raise a lot of interest in the people around me. I went to Jackson Hole recently with friends, but I went up a day early to do some sketching. I hiked around Jenny Lake, up to Hidden Falls and Inspiration Point carrying a back pack of snacks, water, and pencils. I also carried the giant pad of paper.
When I got back to the lake, four kids sat by me at a picnic table and wanted to see my pictures. After awhile the five of us were eating raisins and drawing pictures together. Then the Asian tourists came over to see what we were doing. Then came a boy scout troop, a family with four teenagers and a guy who sparked a conversation about woodworking. Another lady had taken some very good photos of Jackson Lake and wanted to email me her photos. So, my art lesson on this trip is: a giant pad of paper makes a great billboard.
Since the paper was so big, I had to scan the sketch in pieces. So here's a composite of a sketch I did from the porch of this fantastic house where we stayed.