Here's some more info for "neighbors" (that's me):
http://richmondsfblog.com/2015/08/04...al-august-7-9/
In particular:
If you want to get through or around the park this weekend, plan on using Park Presidio / 19th Avenue, Stanyan, or the Great Highway (and don’t expect it to be quick).
Yeah, I knew that. I just hope it isn't insanely slow (e.g., an hour to go a few blocks or something).