I wrote a letter, sent it to the local sheriff, and never received a response. The local PD said there's nothing against it but don't try it before asking the sheriff. He never responded.
So far as the law states, there is nothing against open carry in prohibited places (on a state level, obviously the PO and such are still a no-go) that I, nor my lawyer, can find. After previous OC incidents, I won't be testing it, though.