I'm not sure if they typically cover Hayward, but in our case _Island Cat Resources and Adoption_ (ICRA) based in Alameda was able to help by providing a live trap and assisting with spaying. http://icraeastbay.org/
Fof in richmond fix our ferals can help...pls go on their website as they can help!!!
It takes time & patience- trust must be earned; spend a few minutes with them every day- multiple times a day if possible- and play with them, feed them treats, talk to them... Cats are social my nature, so earning their trust will yield amazing results. You've been chosen by the momma cat- be the hero.
Purchase a live trap.. put it where they are...good luck
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