Regular FAK with "OUCH items" is in the master bathroom in a metal FAK box with a gasket to keep water out. (Think utility truck FAK box, but restocked with quality stuff.)

Each vehicle (4) and the 5th Wheel RV has an extensive FAK in an USGI M3 bag that a SF Medic turned MD helped me design. Some of the stuff in those is for when a trained responder shows up but has no gear. (Airways, etc.)

Motorcycle has a small kit of "OUCH items" and a few items for major bleeding plus sunscreen, lip balm, monkey butt powder, and bug dope.

Climate controlled Storm/Safe Room has the portable hospital that is also transitioned into 5th Wheel if entire family is going on a trip.

All of the FAK's also contain a small pack of hygiene wipes and feminine hygiene products for the ladies in my family. That small inclusion has made me very popular with both DD and DW, as they are forgetful.

I carry so much, because I seem to be the guy that either witnesses the accident, or comes upon the accident just as all the parts finally land.