Tangipahoa parish seems very OC friendly or at least neutral. I've never had so much as a funny look there (so far ). St Tammany is probably similar in attitude, at least in the rural parts.
Good place to put one's toe in the water and get comfortable with carrying openly.
Give a holler next time your coming out this way. There's a couple of us on the northshore that are willing to get together at the drop of a hat.