Israeli pressure bandage on your person, and know how to use it.
fleacebay is where I got mine.
I got the in date IDF ones 4 and 6"
chainsaw injuries are either fixed with band aids or major surgery.
not much in between.
and felt picks for removing wood chips from under your eyelids, and some burn cream pretty much covers the basics.
Then add what ever else you are familiar with and know how to use.
And a fresh tube of super glue.
Thomasinvancourer has a great list
I also have a stitches kit, but have used super glue successfully too to bring wounds back together.