Where were Camp Warner, AR and Camp Armstrong,?

Camp Rogers no doubt was at Lempkins Mill, MS, near Gernada, MS where Lt O C Gray returned with the horses listed "private", with "public" marked out on form #32 for forage from 23 Nov [Princeton,AR] to 11 Dec, signed by Gray and received by Capt J H Bartholomew Dec 11, 1862 at Camp Rogers, Miss. as opposed to "Public" on