You guys in the Santa Cruz area have no C3 (Calguns Community Coordinator) to lead this charge for you, to my knowledge.
So, you can just take the initiative. Pick a place to clean up, pick a time, announce it, get some RSVP's and go do it.
Here's an attachment in Word for a checklist we're developing for this kind of thing, to help you get past the "gotcha's ". It's probably massive overkill for what you want to do, so just pick and choose the things that make sense. (I never thought about bringing a wheel barrow until someone mentioned it.
If there's anything we can do from Sacramento to help you, let me know.