I researched the West Woods fight as part of a tour I gave last year.
If you can get to the Antietam Library, I'd recommend it. Of course they have
the Carman papers plus Carman maps.
They have a "West Woods study" that gives background of the area and Rangers
are very helpful.
Walking the ground is a key to really understanding this part of the battle.
I found the Blue & Gray issue "Massacre in West Woods" to be a great help.
Certainly Harsh, Sears, Priest, and Official Records will provide good
Early's report and several others (Howard, etc) were quite revealing.
I'll check my materials and see what else used.
For what magazine would you be writing the article for?