In my years of camping we have discovered the closer you are to the city you get more trash, misuse and noise from campers. It appears to us that the easier campers who are not serious outdoor folk that can drive a hour or 2 have less respect. So when we go camping we like finding places as far away as possible from city lights for this reason.
I am lucky to live in a area that we don't see a lot of these issues. I have lived in states where is seem to be much worst than other areas.
Thanks for helping cleaning up the trash.