simple, free, isolated
Although it's not immediately convenient to the various hiking trails in the Lee Ranger district of Washington-Jefferson NF, this little site is tucked away atop a mountain far from any crowds. Not too long a drive to get there, but long enough for some seclusion. The sites are well-built and serviceable, but don't expect working water or much else in terms of maintenance. It's free, of course, and have I mentioned that it's quiet and secluded? A babbling stream is close enough to ease your sleep, but watch for bears.
And despite the isolation, there's the nearby town of Wardensville, recently re-invigorated and worth a look…starting with the Lost River Trading Post.