Medcine is constantly changing, a lot of what we think we know has now been proven to be not true...
To be blunt, your asking the wrong question, it is not what have WE seen but what MIGHT YOU have to deal with ....
As an urban EMT, and a WEMT ( wilderness emt) I have seen a lot.
When I am not working on an ambulance I teach Wilderness First responder classes.
Some fun facts
Most common reason people are evaced out of the back county is for some sort of GI distress ( bad belly) the most common reason? Fecal oral contamination.
Second most common reason, some sort of athletic injury. Most common, injured ankle .
Here is what it really comes down to, Sat phones and beacons dont work when you want them to, first aid kits get lost/ destroyed/ used up all the way, and people get hurt.
Training, is the number one best tool in your first aid kit. Hands down. Your training might be the difference between doing a full assessment on a loved on and deciding that they can stay and play based off of facts and evidence, where before you might have freaked out and and called in the chopper. and suddenly you have a 30k bill.
If you are not sold on the training the best thing you can put in the first aid kit is as follows
1. BSI ( body substance isolation) ( Gloves)
2. two rolls of tape
3. some sort of field guide or manual small sized that can walk you through recommend protocols and treatments.
4. small leatherman/multi tool/ knife
5. Irrigation syringe
everything else, can be improvised, and I mean just about everything. there is nothing that can beat good judgement, sound decision making skills, and solid risk management.
Keep in mind there is a LOT of bogus BS nonsense medicine and toys out there. People are trying to make money and will market just about anything. Keep your eyes open for stuff that sounds to good to be true. Top of the list, snake bite kits, salts, sam splints, and triple antibiotic cream
Go get trained. I might be the one thing standing between you and a major problem.
Check out these programs all very solid
Feel free to PM me with questions this is my passion and my job.
WMI ( runs a lot of courses out of CA)
SOLO
WMA
Desert Mountain Medicine
AARIE