I feel your pain. When I was a park ranger in Oklahoma, after a busy holiday weekend we would find all kinds of trash just left on campsites, sometimes bagged up or just scattered around. We asked some folks why they did that and they would say 'Well, y'all got people workin here who clean that up, don't y'all?' Yeah, because now we have to. As a State Parker Ranger collecting your camping fee, I get your home mailing address on the receipt. There was once an incident where some particular trashy campers went home and a couple of days later their boxed up trash got mailed to their home address. Took a little effort and cost a little bit, and not sure who would have done that.