I have a map of the area and it shows the JSA as being due west of Libby Bridge, not south. It does not depict a Camp Bush. It shows HHC, 2/23 Inf at Camp Dodge which is few miles south of the JSA and just northwest of Freedom Bridge.
According to the map I have, the camps that are south of Libby Bridge were Camp Wetzel (A & B Companies 1/9 Inf), Camp Young (HHC 1/23 Inf), Camp Ashworth (HHC 1/9 Inf), Camp Reddick (C Co 1/9 Inf) and Camp Wilbur (B Co 1/23 Inf).
I served in this area in 1986-87 when most of these camps had either been closed or turned over the the ROK Army.