Basic tools

Water,

lug wrench (it amazes me how many people with trailers don't have a lug wrench that fits)

jack

Blanket to lay on road if changing tire (asphalt gets hot)

Tire plug kit

Code reader/reset tool. If you get a check engine light/reduced engine power this is really nice. It has saved me from tows multiple times. It has also let me help others.

Medical kit

That's just the things I seem to use.

Air compressor

Tire repair kit

Impact ratchet

Socket set

Misc pliers, knives and hand tools

Windshield fluid

Motor oil

Camp fuel

Big ratchet straps

Little ratchet straps

towing hitches

Rope

Sat comms

Battery pack

USB cables

Jumper cables

Spare fuses

Propane torch

Felling axe

Splitting axe

Hatchet

First Aid Kit

Trauma kit

Med kit

Wool blanket

sleeping bag

6x MRE

Mr Noodles

Dual fuel stove and pot

Cutlery/Bowl set

Flashlight

Change of clothes

Dog treats

Protein bars

Dehydrated coffee/chocolate

Wet wipes

toilet paper

Shopping bags

garbage bags

duct tape

zap straps

Shovel

If I expect to be hitting a gravel roads or being out of cell service I pack a bunch more stuff, the above lives in my truck all year.

Good pair of shoes, rain/bad weather gear, gloves in case I need to walk somewhere and I’m in attire not suited for outdoor activities