It seemed good enough to me. You already mentioned the "opinions" of two state officials, but as was said, if there is no LAW that confirms their "opinions" then their "opinions" mean absolutely nothing.
I would suggest searching the laws of AR. To me it seems quite obvious that OC is allowed, but it will more than likely be a rough road (until AR gets case precedent to back up the law -- sad but true) for one or two open carriers when they are dragged through the courts due to the actions of an overzealous and tyrannical "cop." This shouldn't keep you from exercising your rights though, so I say carry on.