Jack --

If you have not read it, find and read Clifford Dowdey's Death of a Nation: Lee and His Men at Gettysburg. Soft copies sell for less than the price of a double-cheeseburger at Wendy's, and are a lot more satisfying:

http://www.booksrevisited.com/cgi-bin/booksrev/83874.html

Having seen the battlefield, you're in a better position to understand and appreciate the command decisions made by Lee and his lieutenants during the campaign. Death of a Nation isn't the most detailed study ever written, but brings into focus what went wrong at each step, from the capitol in Richmond to the grassy slopes of Cemetery Ridge.

Wish I could write as well as Dowdey.