I do this once every couple of months. I save all our bones, mostly chicken and pork, in a freezer bag and do an 8-12 hour session in the crockpot.
When done, the bones are hand stripped of all edible parts. These are NOT added back into the broth, but usually eaten as a meal or sandwich spread. Then the cooled broth goes to the refrigerator or freezer.
I use 1 gallon Tupperware but it can also be spread among smaller containers. Label with dates and rotate.
Occasionally I will add spices during the cook down, but usually I'll wait until I use the frozen broth in some dish. Adding vegetables, fresh or frozen, makes a good soup which will serve at least 6.
I DO NOT add salt because we already get enough from other packaged foods.
The process is simple:
https://www.newlifeonahomestead.com/how-to-cook-bone-broth/In a crisis situation, a continuous pot of bone "soup", over a camp fire if necessary, will give you some good nutrition while making your food stores last longer.
DO NOTE the list of nutrients in bone broth.