On the subject of trash: We all know there are some places so badly littered that you couldn't clean them up by yourself. But we can easily make a dent, or police up mildly littered places. The requisite tool is a grocery store plastic bag. I keep one side pocket of my gear duffle filled with them. Just stuff a plastic bag or two in a pocket or down your waders. It's no burden, and easy to whip out and collect a few cans, wet paper, etc.