IANAL but as far as I know it is legal in Parkersburg. Open carry is really not that common in WV though so there is a chance of being hassled in one way or another, if you don't want this, don't carry is my advice. I'm not trying to steer you away from open carry, just being realistic. Everytime I carry I know there is a chance of being hassled but I am prepared to deal with it, simply because it is not common in WV.
But if you want to stand up for your rights and are willing to deal with the crap you may face, knowing you are legal then by all means go for it!