well, your major roadblock is going to be getting the state supreme court to overturn it's previous decision of what constitutes a concealed weapon. Currently, any gun that is concealed 'in part', which according to the courts decision would include hanging the gun around your neck with a string tied to the trigger guard, is not covered by the constitution.
This decision was handed down in the 70's. Has the makeup of the court changed? If so, you can take another case by getting charged and hopefully have a less biased court hand down a decision similar to Louisianas supreme court.