California landlords - use of video cameras when showing property

[Kimberley P.]

Is it legal to have a video camera in my vacant rental property when I'm showing it?  Does it have to be within view or can it be hidden?  I am not trying to spy on people, I am a woman showing vacant single family houses so it is for my safety and documentation.   In researching California law, I can only find laws pertaining to home or workplace use of video cameras where it says it is illegal when someone has a "reasonable expectation of privacy" such as in a bathroom.  No one would have an expectation of privacy when viewing a vacant house, would they?  Do you use cameras?  Can anyone reference specific CA law pertaining to this?