As long as you have cell service and AAA can get to you you'd be allright then.
Store bought trail mix, beef jerky, snack pack crackers /cookies hold up well in a tupperware box.
In both vehicles; Extra clothing vacume sealed in seal-a-meal bags. Bags are tough, durable, reduce the amount of storage space required and keep contents clean & dry. Also, 1 box of carry ammo, a Surefire "spares" kit (bulb & batteries) 12V cord for cell phone, first aid kit, fire extinguisher,
Additionally, in the truck;
Basic pioneering tools (chainsaw/gas, axe, shovel, tow strap/chains, come-along), a 5X7 and a 10X20 tarp, 1 roll of 1/4" synthetic rope, case of bottled water, hand tools for field repairs, 12V tire inflator, warning triangles, jumper cables, cheap headlamp -for my head- not the truck.