The stories of alcoholic beverages historically being safer to drink than unfermented ones are apocryphal at best; however, as any 17th-century sailor would tell you, the addition of some spirits to potable water that's been sitting around for too long will make it much more palatable. Liquor distillation was originally invented in part for medical purposes, and alcohol can be used as a solvent to dissolve medicinal herbs -- and also to knock out patients during good old-fashioned fallout-shelter surgery. High-proof alcohol can be used as an antiseptic, and it does a great job of cleaning wounds and preventing infection.
Of all the supplies they suggest you legally or illegally procure, epinephrine sounds like the biggest stretch. We don't want to burst anyone's bubble, but if you suffer from life-threatening allergic reactions and really think you're going to survive limited food sources and practically nonexistent medical care, we've got a mint-condition fallout shelter to sell you.
Each type you listed (save a couple) will have its uses in a community (group if you will), generally having a small trusted group with each having several skills in the various fields (prepper, homesteader, and survivalist) I believe would be an effective team, though as each group works together would it not be best to ensure that each has overlapping skills in case of injury, death, or other reasoning they can not fulfill their duties?
We had been friends for at least 12 years and knew that the one was Bi Polar, she seemed to have her act together over all, but when we allowed them to live with us, within just a couple of months, problems started that would potentially cause any type of cooperative survival situation to go right down the toilet. We still feel sad about losing the friendship we had shared, but have to admit that God blessed us with knowing what sort of crap COULD have happened very easily in a SHTF situation.
Mylar emergency blankets are great survival gear but sometimes you need more than that. The Coleman North Rim Extreme Weather Bag will keep you cozy warm when the air temperature is 0 degrees Fahrenheit. In temperatures like that you can lapse into hypothermia quickly especially if you’ve been slogging through the woods all day and are sweaty. Just crawl in the North Rim bag and pull the drawstring to lock in the warmth. The cover is durable rip-stop nylon so you can lay it on the ground if need be and there are snag free dual zippers so you can get in and out quickly and easily. Must have survival gear for winter adventurers.
This group stresses being able to stay alive for indefinite periods in life-threatening wilderness scenarios, including plane crashes, shipwrecks, and being lost in the woods. Concerns are: thirst, hunger, climate, terrain, health, stress, and fear. The rule of 3 is often emphasized as common practice for wilderness survival. The rule states that a human can survive: 3 minutes without air, 3 hours without shelter, 3 days without water, 3 weeks without food.