The ruling didn't address the 1st Amendment issues because the Court wasn't asked to address them. This was only about local laws on the use of public property. Nordyke, however, was a bit on the strange side. The issue there was a narrowly tailored law that had the effect of outlawing only one type of activity; gun shows. While the Court says that counties are within their rights to ban certain types of uses for public venues, this approaches the same end, but by sneaky, backdoor means. The Court seems to be leaving itself wide open to reversal there on equal protection grounds. Great Western and Nordyke could still be reversed on 1st Amendment grounds. The "Freedom of assembly" argument is a compelling one, but was not at issue before the CA Supreme Court.