Basically, I'm prepared for things like:
I'm probably forgetting a few things, and I have enough quantity of these items to treat several patients - eg. a multiple injury car accident. What I may talk myself into is a tracheotomy kit, chest drain kit, the aforementioned intubation kit, stethescope & BP cuff, maybe IV and blood expanders, but those have a short shelf life. Oh, now I remember what's next on my list - smoke grenades to use as signaling and wind indicators for flight for life landing zones. I've already got ear and eye protection to act as landing guide...
Yes, I like to be prepared. That duffel is in my car 24x7. Yes, I've used many of the things in there except some of the serious trauma gear. Did I mention my mother was an ER nurse and impressed upon me the need to be able to take care of business? Also I have unfortunately watched someone die, someone I helped treat after a serious vehicle accident and he died on the scene with EMTs working on him. S***, just typing that still brings a tear to my eye.
You try to do a tracheotomy, or reduce a hemo, pneumo, or hemopneumothorax, WITHOUT proper training, and CERTIFICATION, and you’re going to JAIL, and spending the rest of your life in civil court...if you’re lucky.