In Cry Danger they drove up Sunset (now Cesar Chavez) and turned right on N. Hill Place. The trailer park was maybe 500 feet up the road, on the right. It sat right above Ord Street in Chinatown.
What I meant in my last post was that the J.W. Robinson mansion looks like it may have been in about the same location as the Clover Trailer Park was 40 years or so later.
Clover Trailer Park was located in the highlighted area
Google Maps