"Cache In, Trash Out." CITO is a basic tenet of geocaching and something all good geocachers should do, whether it's at an event ... or simply if your out hunting on your own. And after you're done cleaning up, anything you find needs to go in the dumpster.
I've supplied the dumpster, now all you have to do is find it.
I repeat ... look for a 2-wheeled trash cart.
Happy hunting (and don't forget to pick up some trash)!