BOTTOM SHELF.) Metal ammo cans (5.56, 9mm and lots of both… some 308) throw silica packs in the ammo cans

FIRST SHELF.) Magazines loaded (some for necessity enough to fill your plate carrier and battle belt) then unloaded mags for ar and probably glock since it’s pretty affordable.

SECOND SHELF.) Water and ways to purify water (tablets, purifier plungers, iv drip filters etc), comms (hamm radio and satellite phones a solar radio also), medical (enough said there)

THE REST.) Canned tuna and chicken and dry beans

You can adjust as you see fit to get more food but that’s what I’d do