i have almost the same things minus the winter kit and chair. I also have:
1 Mid size fire extinguisher and 2 small can type extinguisher - It wont help for ev fire, but mainly for all the grass fires i see
A few pairs of gloves, hi-viz vest,
Many flashlights on top of the one in the door...
I am doing a 5-tire rotation till its time to get a new set. Then I am only going to buy 4 and leave the "used" tire as the spare. Then just do 4 tire rotation