We have in our vehicle a toolbox full of food we call the tucker box .
It has a heap of vermicelli , ( its like 45cents for enough to feed two people )
tins of pineapple pieces
tins of coconut cream
jars of tomato paste
fish in the soft packs ( they pack flat and take a lot less room than the round tins )
boxes of UHT milk
coffee
tins of assorted stuff like mushrooms peas beans chickpeas stew etc
thats the basic stuff , we have enough in that box to feed the 6 of s for a couple months
we buy extras every time we go shopping "for the tucker box"and now, at end of year , we travel and our only costs are pretty well vehicle related since we tent camp and have our food pre bought .
Usually we bring 3/4 of it back with us again , since we live on bush food when we get out of town ... but there have been times when we had serious vehicle issues and were camping for weeks in the one place till parts could be sourced and repairs made .
Still , vermicelli is good enough to eat , mix in a packet of fish for flavor , or a tin or pineapple and coconut to make it "tropical" whatever , mix n match , and tell the kids its camp food , it goes down well enough .
where ever we are , there is usually something growing in the way of fruit or greens or veg , we have the bows in the car usually when we go , so we have fresh meat too .
The vehicle we have is a 22 seater bus , converted to a 8 seater with heaps of storage / carrying room for our gear , when we go for short jaunts with only a few people the box sits in a 6x4 trailer we drag behind the car , as do our tents and stuff
but the bus is the get go vehicle , its always packed and stocked and ready to roll out with minimal preparation , it might be slow , but its reliable and roomy enough we live in it when the weather sux