This thread got me thinking.
We used 10% of the stuff in our trauma boxes 90% of the time.
(normal saline, 4"x4", 6" cotton swabs, ECG leads, etc.)
90% of the stuff we hardly used.
You are not an ALS wagon, but other than some O2, you can get close to BLS capability.
As far as hardware, think good penlight, watertight clean box, BP cuff(manual, not AA powered) can also be used to push fluids if you start a line…
Latex gloves. I'm not going to get Hep C because of your dying azz.
I'd rather have a lot (or, at least enough) of the items you are most likely to use, than a ton of stuff that may not cover the high spots.
Yeah, a liter of just normal saline, think eye wash, wound irrigation, etc. really isn't a lot. Get an eye patch, protects and helps immobilize in the case of glass fragments, epic face plants.
A sh&#-ton of sterile gauze and 4"x4"s, most of your meds will be OTC, but, you can get the typical epi-pens, benadryl, topical analgesics and just aspirin/acetaminophen can be very helpful.
One you may not be familiar w is silver sulfadiazine, my go-to for minor burns, stuff is magic, also OTC.
Cervical collar (large, you can trim it down for a smaller person).
A clean, zip-loc baggie for detached fingers, teeth, ears, toes, you get the picture. It's not like you're going to put them in your top pocket.
If things are really sh!&&$, you may have to maintain a patent airway or direct pressure on an amputation for a long time (any time seems like a long time), remember the Golden Hour.
If you go all Rampart One and do employ a TQ, note time, and for f$#%# sakes, don't take it off.
If there is something stuck in someone, somewhere, DON'T pull it out. You would be surprised how often some nit-wit will try to…
Try to get a pt. history, list of meds., allergies from someone if possible, depends on pt. and situation.
Little kids and the elderly will go south quickly.
Transport to an appropriate facility should be priority #1.
Good Luck.