To the best of my knowledge, most of the Confederates who died of disease in camps nearby and in battle at Iuka are buried at Shady Grove Cemetery in Iuka. The motel is question is on the site of the 11th Ohio battery position. For more info on the site, I would suggest Peter Cozzens' "The Darkest Days of the War" and Ben E. Kitchens' "Rosecrans Meets Price: The Battle of Iuka, Mississippi".