In my SUV (helps to be an avid gear-head camper):

Clothes:

Gore-Tex boots and three pair Smartwool socks
Gore-Tex gaiters
long underwear
fleece and rain pants
fleece tops
Marmot pre-cip and dri-clime jackets
fleece hats and fleece-lined waterproof hats
multiple gloves
fleece neck gaiter and balacava
chemical hand and feet warmers

Gear:

Sleeping bag
Firemaking tools & tender (lighter, matches, firesteel, vaselined cotton balls, steel wool, fatwood, Duraflame log, magnesium)
Axe, knives
Stoves (Jetboil, Kelly Kettle, Coleman duel-fuel)
MSR camp cookset

Food/water:

Water bottles
Mountain House freeze-dried meals (6)
jerky
Pop-Tarts
Luna Bars
Cocoa, instant flavored coffee, tea bags


This and more (flashlights, headlamps, First Aid, jumper cables, tarp, duct tape, paracord/thule straps, air compressor, etc) fits in two 48-gallon Rubbermaid Action-Packers that reside where the backseats used to be. I make a point of carrying extras for others.