So true about sanitation being the weak link. I’ve seen way too many folks focus just on food caches and not give a single thought to waste or keeping things clean. I always keep a couple 5-gallon buckets with snap-on lids ready, plus a stash of kitty litter and sawdust to absorb moisture and help with smell—learned that from gardening and composting days. Bleach is handy but it runs out fast, so I store a bunch of unscented chlorine tablets and also some plain old soap bars. Can’t beat soap for keeping hands and surfaces clean.
For longer-term, I dug a small pit away from water sources and set up what’s honestly just a glorified outhouse. Not fancy, but beats trying to