I walk around the area until I find what I want to draw, which can take an hour or an instant --- I try very hard not to be noticeable, but this is not always possible. I need 3 or 4 hours, and I like to make sure the sun is behind me... also not always possible. I discourage conversations with onlookers---although I find it hard to resist talking to the children who gather to watch. I always take drinking water and something to eat --- pretzels, M & M’s, etc.
I take out my folding stool and a plastic box where I place my colored pencils, Rapidograph pens, and magic markers. I start working, using the same fine Arches paper, same size and format, and once I start, I never leave the site. Usually drawings take 3-4 hours. I take one piece of paper to the site with me --- no more because I might be tempted to start another drawing. I draw slowly and have no real margin of error: nothing I draw is erasable. When I do something I am unhappy with, I work it in.