Some epoxy glue should seal the hole in the humi. I would have used the screw driver. I always travel with a Swiss Army knife in my luggage the Cigar 79. It has everything you need in one package.
Large blade, Patented cigar cutter, Can opener with small screwdriver, Bottle opener with large locking screwdriver & wire stripper, Lever design serrated edge scissors, Corkscrew, Punch, Reamer, Toothpick, Tweezers