One of the back issues of the Gettysburg Magazine (#22) has an excellent article in it about Wofford’s Brigade at Gettysburg (Wofford Sweeps the Wheatfield) and if I remember correctly, the location of each regiment/battalion is shown on the battlefield at or near the Peach Orchard, the Wheatfield and also the northern slope of Little Round Top. These magazines should be on sale at many of the stores around Gettysburg such as The American History Store, Farnsworth House, The Gettysburg Gift Center, etc. or you can purchase a copy from www.gettysburgmagazine.com.