Though not in Rancho Park, the West LA Department of Sanitation Yard services our area. And this Saturday is their open house. We went a few times years ago and my boys loved it. Not sure what our plans are for this weekend but we might go again. Here is the info if anyone is interested:
Saturday, July 16, 2011 - 9:00 a.m. to 3:00 p.m.
West Los Angeles District Yard
2027 Stoner Avenue, Los Angeles, CA 90025