UOC is legal in orange county. No city/county law/ordinance can be any more restrictive than state law (pre-emption).
You are legally allowed to open carry, so long as:
- It is not concealed (without a permit)
- You are not within 1,000 ft of a school or on the premises of a government building.
- The firearm is UNLOADED! (look at the law for the definition of unloaded).
- Magazines can be loaded, but not in the firearm. Attached to/inside a mag holder on a belt is OK.
CA Open Carry's website will have more details.
Out of curiosity, what area are you in Wolf?