Yes I am certified in first aid and CPR but its been a while.
I put together my own kit and put it in a extra large fanny pack. It carries the usual cut, bumps, butterfly bandages, antiseptic and pain stuff plus what I call a big wound kit:
Extra gauze, pads, tape and a big aerosol can of medically sterile water for cleaning out big wounds or severs. We also have some medicine called bleed stop that is supposed to stop excessive bleeding. So far used it for one medium cut and one deep butterfly bandage slice. It goes where we go.
Also have some benedryl in there too for any allergic reactions ie bees, scorpion etc....