I've taken to pretty much keeping my camping stuff in my truck.
The short list off memory is recovery gear, blanket, tarp, water, 1st aid kit, 550 cord, tool kit, spare adujstable V belt, power inverter, drop light, misc.firearms/ammo/mags, dried food bed roll and foam pillow, table, cook set, utensils, extra flashlights, firestarters (lighter, flint, magnesium, fuel tabs, cotton balls), camp chair, folding table, various cutting tools, tent.
I'm always adding or pulling something, so the list varies, but I know I could live out of it immediately for at least a couple days, and with a bit more food and water, for several days.