If you're improving your kit to come out to Point Lookout, you want to make sure you have a top notch U.S. issue Fatigue Blouse.  They work for virtually every U.S. event, and our reproduction for Point Lookout will be a stitch for stitch copy of a versatile John T. Martin contract piece.  It will even include some ugly plaid wool lining material (from Tart) with the (correct type of) selvedge exposed just like the original.