Katemandi here: I can’t say enough about pantries! For the end times you need food. Sure, you might be out hunting in the woods for some critters or foraging in the underbrush for mushrooms and other edibles, but stocking up your pantry ahead of the collapse is just good sense.
Of course you need food that will last a while. Perishables are useless! Think dry dry dry. You’ll be adding water of course in most cases, of course. If you don’t have water — well, honey, I got news for you: you won’t be surviving. So think powders, jerky, dried grains and nuts. Salt! In the medieval and ancient worlds, it was a precious as gold. Not just for flavour but for its preservative qualities.
Which brings me to another point: spices! You don’t have to belong to House Atreides to recognise the importance of spice! You’re going to be eating a lot of bland food that’s been reconstituted. You’ll be grateful for those spices. The good news is that spices keep for a long time if they’re completely dried and well sealed.
Speaking of sealing: have you learned canning yet? The techniques for storing delicious fruit in jams, jellies and preserves is not to be overlooked. You can even can meat, my friend Mary tells me (I got these snaps at her fabulous home at Universal Pathways). The skills are out there: learn them before you need them. You don’t want to poison your crew with poor pantry skills. Be safe, be delicious.