I have found an easy way to pick up the wads of line, empty lure or bait containers, cups, etc. when fishing from the bank. I keep several of those plastic grocery bags in my truck, and have one tied to my beltloop when fishing. They don't weigh anything and lay flat. When I see a piece of trash I pick it up, smash it if necessary and put it in. If the bag gets cumbersome and no trash can is available it gets tossed behind the seat and I get a new one. Yes, the small space behind the seat looks pretty crappy right now, and I can't believe how much junk others leave behind. But as a sportsman I know keeping things clean is just as important as catch-and release, fair chase, and clean kills.