Did he say that he was speaking for God, and that God told him about the date? I don’t think so, as such your Scripture passages don’t apply.
That being said, his doctrine is clearly flawed. He may have been sincere in his belief, and as it turned out he was sincerely wrong.
If I was a member of his congregation I’d be seriously evaluating other dogma that the church adheres to. There is without any doubt whatsoever other dogma based on similarly flawed doctrine. Some of it may even pertain to salvation itself.
Harold Camping is a false teacher in so many respects and his teachings are on the prophetic words in the Bible. You should hear him pontificate. Just go see a Youtube video and you can clearly see how he thinks he speaks for God. These scriptures I posted are highly applicable and dead on to his activities and the garbage he has been preaching for quite some time.