Our ATV club partners with the 4x4 club every year to pick up trash north of the Snake River canyon ( all around Evel Kenevel's landing zone). The sheriff brings out his work crew and the BLM and usfs have rangers on site as well
Never fails, someone in the group encounters some brain child driving into the area with a pickup bed full of trash, trying to dump it. They usually get a ticket mailed to them...
I am glad to say, though we still get trash dumped, there has been a steady decline over the last several years.