Echo the flashlight and bandana
one or two contractor bags (3mil garbage bags, 33 gallon makes a better poncho than a 55)
more paracord, all you can carry
aluminum foil
swiss army knife or multitool with a saw

spare socks, always have spare socks. even if you must abandon your towel, never in your panic forget your socks

and a sense of humor- murphy will laughing at you, you might as well laugh back