Good idea. Rotate the bio inventory. Out of all your items....a renewable resource that takes very little maintenance.....can be a powerful bartering agent.
I'd also include easy to grow vegetables that are prolific producers. For example okra is impossible to kill once you get it going, and it produces enough to pick it every couple days.
If possible, some sort of backpack in case you have to move from the cache area. Also some tarps with reinforced fabric make great temporary shelters and ground cloths.
Tampons for your lady, and Kotex makes a great field dressing...learned that during the Southeast Asia War Games aka Vietnam.
Y'all should see the solar-powered lights by LuminAid. My friends and I got a bunch before Christmas. Really cool and will always be good until the sun stops shining.