The first place I always suggest is the state constitution, as it is the supreme law of the state. Article 1 sec 11, clearly guarantees the right to bear arms, not merely KEEP arms, as was the case in the recent Heller decision that the supreme court ruled on.
The exercise of a right cannot be subject to a licensing scheme.
If you check Louisiana revised statutes, 14:95, you can read what constitutes "illegal carrying of a firearm." There are other laws in title 40 that address restrictions placed upon persons carrying CONCEALED weapons, but that doesn't apply to open carry.This should be a good start.
http://opencarry.mywowbb.com/view_topic.php?id=13692&forum_id=6NO, do not EVER call the cops to ask what their "POLICY" is. Know the law, stand your ground, take them to court if need be.
You'll shoot your eye out, kid.And what problems will come with me OC?