Well I just finally started looking at the forum's again as have been busy I see that this is an older post and you have probably already learned many lessons (hopefully the easy way), I will still throw in my 2cents as I teach Wilderness Survival and Tactical/Wilderness Medicine here in FL (USA) and am a prior US Marine Combat Medic.
I agree with GRYNCH about Bear repellant kit, I also recommend some rope (550 cord or Paracord works well) 30-40m of it minimum, for setting up emergency shelters or using for first aid, along with hoisting your food up in tree away from your bivy (at least 30m) if needed. I also recommend a miniature survival kit, consisting of some fishing line/weights/hooks, signal methods (whistle/mirror), fire starting kit (lighter/flint & steel/mirror/some tinder/aluminum foil/fuel tab), some water purification tabs and or a good water filter, a caribiner(locking), good sharp knife 8-11cm, emergency blanket, emergency shelter knowledge). Also keep a good jacket and sweater in your ruck,along with spare socks and a warm hat for your head (NOT COTTON!!!!!!!!!!!!) Wool or any synthetic on all your clothing items, including socks and underwear. Some MREs or Dehydrated food, limit on salty snacks, focus on proteins and carbs and keep enough food in your ruck for at least 48hrs.
For medical equipment stick with the "KISS" Principle (Keep It Simple Stupid) keep only the necessary kit needed and stage the rest at your vehicle or AO post as you want the least weight with the most capability. Always keep at least 4 pairs of latex gloves, some sterile 2x2 & 4x4 gauze pads, antiseptic(neosporin), brofen, antidiarrheals, aspirin, some sort of vomiting agent (activated charcoal or just charcoal dust), different choices of needles, sutures, at least 1 syringe (5cc+), alcohol prep pads, iodine/betadine or hydrogen peroxide, materials for tourniquets (either factory ones or know how to make an impromptu one), some gauze wrap, SAM splint always nice, a good light and a backup (preferably waterproof and as a headlamp), good tape (silk or Duct Tape), safety pins, some salt for heat injuries and rehydration, instant ice pack is nice to have, airway kits, several choices of catheters, and IVs, limit yourself on the main pain killers just keep some (morphine and high strength brofen or percocet), Epineprine pen is good to have, some nitro, scalpel blades of several different sizes and duplicates, good stethescope and or BP cuff, along with a C-Collar (adjustable)
I know im forgetting a few things just off top of my head is what I carry with me in my car always.
MAKE SURE YOUR PACK EVERYTHING INTO A WATERPROOF TYPE RUCK OR SEPARATE BAGS IN YOUR RUCK!