I left the following comment to version #8 (AaronFitz):
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The sign at the entrance says NO TRESPASSING. No exceptions. It is not because it "looks walker friendly" that the sign is open for interpretation. It looks bike friendly too, and I did ride my bike there. Yet, you only changed pedestrian access. Why?
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PS Something that is often overlooked:
https://wiki.openstreetmap.org/wiki/Tag:access%3Dprivate#Clarification_of_the_term_“private”
access=private does NOT mean private property.  What would you suggest as edit to make this complete and correct?