For the Cotton Plant wounded info and hospital trip to Des Arc and Little Rock take a look at the book THE RAGGED REBEL by B.P. Gallaway. I don't know what your researching about Camp Nelson, but books like JOURNEY TO PLEASANT HILL, THROUGH THE VALLEY OF THE SHADOW OF DEATH, THE CAMPAIGNS OF WALKER'S TEXAS DIVISION, IN THE SADDLE WITH TEXANS and many other books that mention Austin, Arkansas and Camp Nelson give you a good documented start. And then throw in the hunderds of letters that pertain to Camp Nelson and you have a nice time line and history of Camp Hope/Camp Nelson and as some of the soldiers calld it "Camp Death".
One thing I should mention at Austin, Arkansas there were three confederate camps. One was west of Austin, one was east of Austin and Camp Nelson was south of Austin. So Camp Nelson has become a catch all for these camps, but when you go through some of the letters and journals, you see they were miles apart. Even some of the soldiers were confused, in the Walker's Texas Division book one soldier says Camp Nelson is two miles east of Austin, which is not right, he has his directions wrong or is calling the eastern camp Camp Nelson. In a Missiouri soldier's journal he calls the western camp CAMP #1.