I would say to use a gps enabled phone, bring a map, or ride with someone who is familiar, or just do it!! AC/DC starts from W side of Chain Ring, at a huge berm, can't miss it.(two way traffic but flows best W to E) Miles of flowy fun single track, with a roller coaster section sporting six or seven bridges. shortly after bridges, at botom, you can choose to finish AC/DC or take MCR out. Ac/Dc Both are more flowy goodness, MCR probably easier.
Chain Ring
http://www.singletracks.com/item.php?c=1&i=8568