Was there a property survey done at time of sale? (States vary on this as a requirement.)
The reason to ask is to see if there is a road easement, a Right-of-Way, legally defined across your property.
(Such things are considered a detriment in property sales, as you often have to pay property taxes on a "community" asset, like a road.)
If this was just a driveway to the property, that was extended to the other paved road for the owner's use, that does not necessarily make it a "County" road (other than by adverse possession, which is a topic for a different forum).
If that latter is the case, you can just put up a gate on one of the sides of the "through road" (you will likely be required to leave one open for 911 access. The gated side would need prominent "Private Property" and "No Trespassing" signs; the "open" end would need "Private Property" and "No Outlet" signage.
Maybe.
Perhaps.
(Might take some lawyering, too)
Now, if it's an easement, and especially if your property is divided into legal lots on either side (which would be ideal as you would not be paying taxes on a public road) then the road is the road.
However, that does not mean you have to have no barrier to the road and those using it. And, rather than a fence you could just put in plants and have a hedge, instead. A person could find some local to WV vegetation that would be perfectly in place, but under-inviting to the uninvited. Simple things like thorny holly or even wild rose varieties can be placed to be a detriment.
Now, the other sides are both simpler and more complicated. out of the swampy areas, I'd be inclined to create a mown strip as close to the line as I could. I'd buckle down and get stakes and one strand of wire up, too, if only to hold up No Trespassing signs. In the swampier areas that's tougher sledding. But, if you don't give people a clue, then they can plead ignorance.
That's 2¢, spend it as you will.