Have your knee checked, a few pills or shots can prevent a whole lot of issues that might affect a moose hunt.
Regarding your question. Most important thing you can take is what’s between your ears. Adapt and make use of what you have with you. Most everything with you carry in the woods has multiple functions, with a little ingenuity they have a lot more.
On my Alaska hunts I take a small first aid kit I got from the medic on Brother Bob’s Special Forces team almost 40 years ago. It is small, less then half the size of my I-pad, but it has everything I need, or am capable of using. It has a suture kit, typical medicines I have added and rotate like Excedrin, Alieve, Neosporin type antibiotics, Tums, and any needed prescriptions. My doctor gives me a prescription for pain killers and antibiotics in case me or my hunting partner should need them (haven’t had to use them). If you are squeamish and don’t like sewing yourself up, they make super glue that will work instead of sutures, if you are careful with the wound. I took a backcountry first aid class about 15 years back, don’t remember much from it but take the small field book from the class with me. If needed, it can be used for reference, or to start a fire, or even toilet paper (Couldn’t help poking a little fun at the current TP shortage in some places).
I have used the suture kit several times to remove flys and stitch up a couple of minor cuts in other people. While in college I once used dental floss, a sewing needle bent and sterilized at the stove, a pair of needle nose pliers, and Listerine ( for sterilization), to put in 13 stitches and close a big gash in my leg. Before anybody asks, yes, alcohol was involved.
Again, what’s in ones head, knowing when and how to use it, are the most important thing to take.