For your meat cooler freeze a case of drinking water bottles, 16 oz, that way your meat isn't soaking in water from ice. A 120 qt cooler will hold a cow elk, have to bone out a bull. Also don't open your meat cooler until you have something to put in it, ice stays longer that way.
I pack a boning knife and 4 to 6 pillow cases, send the wife to yard sales to get them, and do the gutless method on game. I put a qtr in each pillow case and use one for backstrap & tl's and one for neck, rib, brisket meat. King size cases are necessary for bull elk, you can get by with 4 for deer. I'll take care of the animal, hang the meat in the shade and head to camp for the pack frame. When you are done you can either wash them up or chuck them and send the wife out yard saleing again.
JLG forgot to mention you can use the weed sprayer for a shower, just add hot water. A friend of mine bought a 2 gal stainless steel one and put on a longer hose - it works great for showers. He just sticks it on the burner to heat up the water.
I also use hand sanitizer on my feet, arm pits and other stinky spots, then clean up with a diaper wipe. Also have diaper wipes in my pack to clean up after taking care of game or the #1 reason - no monkey butt in the field. A sweat rash 5 miles from the truck is no fun.......