I am trying to recall where I saw something about hospitals in Richmond during that period & if I remember then I will certain to let you know.
Meanwhile, you mentioned the Ogletree family in your post. My grandmother's grandfather was Absalom Ogletree who served w/ the fifteenth Alabama. He was captured in the charge up Little Round Top and finished the remainder of the war at Camp Douglas (I think, I do not have my notes in front of me). He is buried at Eastview Cemetery in Conyers.
I am very interested in any family connections, &c. Please feel free to e-mail me at the above address at your convenience & I will try to find the info I have on Richmond hospitals as well.
If you are local please join us at our meeting in July & I will bring what I have