Michael,
I don't know if the following book has what you are asking for, but you might try Russell Mahan's FAYETTEVILLE ARKANSAS IN THE CIVIL WAR (Historical Byways, 2003). As far as I know it can still be purchased from the Camp Pope Bookshop.

I know the battle map from an earlier book by the same author THE BATTLE OF FAYETTEVILLE, ARKANSAS (Historical Enterprises, 1996) does show the location of the Union camp, HQ, arsenal, and hospital buildings. This is an inexpensive pamphlet, but I think it might be out of print. I posted a very brief overview of it on my website:

http://cwba.blogspot.com/2006/09/battle-of-fayetteville-arkansas.html

Mahan also contributed an article for North & South magazine dealing with the battle that might include some more detail on its map (I don't recall its merits specifically).

Drew