small hand held LED light using same batteries as the headlamp, probably AAA...I EDC'd a Gerber Tempo for years, and currently Fenix E01 and spare battery

if phones in the area still take coins, a strip of 4 quarters on a piece of tape don't take up much room

small bottle of tincture of iodine, and instruct on how much to use to disinfect water with the metal bottle volume

if allowed instead of a knife, I'll still pitch the use of a pair of electrician scissors like the Wiss 175E

roll of friction or electrical tape

pencil/pen

P38 can opener

needle nose pliers with wire cutting capability