I have had legitimate reasons to walk on to another person's property, take pictures of everything, and leave without knocking. I was a private contractor for a repo business, and companies who have interest in such things (lenders, mostly) usually have stipulations in the paperwork that allow this. These were mostly mobile homes. I wasn't supposed to tell anyone why I was there, unless I was speaking with the person who owed the money (violation of privacy). If there's a tenant, I could ask them if the knew where to reach the owner, and I should identify myself.

The county appraiser in my county takes pictures of my place every year. He doesn't knock.

If he had a legitimate reason to be there, of which you may not be aware, he may be back to get the needed proof that he was on the property so he can get paid. Who cares if his camera is pink? Anybody casing the place is not going to want to interact with the owner, I would think.

Karen