If you don't end up in any school zones you may be ok.
South Bay Open Carry ran into some issues with the board of fair organizers and the city.
If they are allowing free unrestricted access to the fair as I suspect it would be difficult for
them to justify restricting you for legally carrying. Don't forget your recording devices and
some literature to handout. Check out southbayopencarry.org articles for the one about
the Manhattan Beach Fair. Have a great open carry day.