I get out to Dolly Sods and/or Roaring Plains several times a year. In my opinion, it is the best hiking locale north of the Smokies and south of the Whites.
The Mon in general is superb. It's also huge. As the article author pointed out, its almost 1,000,00 acres in total and hosts over 800 miles of trails, including part of the American Discovery Trail. If you're a hiking enthusiast and within reasonable driving distance of eastern WV, do yourself a favor and plan a trip to some part of the Mon.
The West Virginia Highland Conservancy (www.wvhighlands.org) prints a regularly updated guide to the entire forest and makes it available on CD as well. It contains detailed trail descriptions of almost every area of MNF, including maps. Their website also has lots of additional visitor info and news.
Another awesome resource for hikes in MNF (and all over MD, PA, WV, and VA) is www.midatlantichikes.com, run by Mike Juskelis. He has dozens of hikes mapped out in the Mon, all with detailed info and most with GPS coordinates, including almost every trail in Dolly Sods and Roaring Plains.
Just a word of advice- despite the elevation of 4K and under, the Dolly Sods/Roaring Plains area can experience very harsh weather. Last year, an area ski resort reported over 18 feet of snow. Winter comes in early and is reluctant to leave. I can be cold, wet, and very windy on any day of the year, so prepare like you'd be hiking at 10K elevation.
As for mortar shells, well even though its disconcerting to rock hop across a talus field right up to a sign denoting the potential of live ordnance, the area has been swept and swept again. To my knowledge, the only are affected (and the only place where the signs exist) is the extreme northwestern corner of Dolly Sods North. I wouldn't be any more concerned about that than I would a bear attack- even less so in fact.
Oh, and if you hike Dolly Sods, your feet will get wet. Great place to test those fast drying trail runners!