Linda, there's an excellent account of a similar situation following the failed Confederate attack on Helena, July 4, 1863. Dr. William M. McPheeters' diary, published as "I Acted From Principle," recorded a detailed account of this Confederate surgeon's experience in caring for the wounded after the retreat of the Confederate army. The Confederate hospital attendants and surgeons were pretty much left alone by the victorious Federals, who provided medical supplies, food, etc., as required and requested, but otherwise let the Confederates care for their wounded as they saw fit.
Just another interesting bit of "trivia" in this book, which is chock-full of little-known incidents in the war on this side of the river. I just can't say enough good about this book. The average reader, I am sure, would find the book boring; but the serious Civil War student will be fascinated with the details of army routine in the Trans-Mississippi. I've got so many Post-It notes stuck on various pages of interest, it makes me wish I'd bought stock in the company.