I have canned soups that can be eaten straight from the can in worst case scenarios. The most basic campfire would work if you wanted them heated and the post on an Esbit stove is perfect.
I see more foil-packed/non refrigerated foods available in grocery stores, much like MRE's. Pasta and rice dishes come to mind.
Foil packed tuna is an easy one, peanut butter, Spam, canned and dried fruits, nuts, Sailor Boy Pilot Bread, rye crisp, beef jerkey, sardines,
If you can break out of the cookless requirement and can heat water, good ol' hiking dehydrated dinners and foods from the grocery store open up the possibilities and will make for more palatable meals. A cheap pot from a thrift store will do. Don't forget a can opener. or better yet, a Swiss Army knife with an opener.
I would have a water purification method and some storage, not to mention all the bottled water possible.
A big cheap blue poly tarp takes little room if just stored flat on the trunk floor. Add an axe and/or saw and some fire starting stuff. BTW, road flares are the best fire starter ever made.