Prepadoodle - For a guy that says he is not a "prepper", but just a guy learning stuff - You sure know a lot and have a lot. You may be crazier than you admit. 
Yes - noticed you had mentioned those IMMEDIATELY after I posted my reply.Inor, these HALO thingies are already sticky enough to seal to the wound, that's what they are for. I guess you should have 2, because it might be a through hole and need one on each side. I'm thinking you could slap one on the exit and use the wrapper for the entrance hole if you had to, so 1 would be the bare minimum (easiest) way to go.
Here is a good place to start....Ok, a question for all of you. I have seen other posts about having syringes, and painkillers. How do you guys get a hold of the drugs when they are so heavily regulated? I can get sterile syringes of multiple sizes and gauge needles all day long at my feed store, but what about the injectable drugs, such as pain killers, antibiotics, ect.?