If you say BOB but really mean cache then we can't respond in a meaningful way, the terms of reference are not valid. Using correct terminology is important in communication, especially on the internet. There's a huge difference between a BOB and a cache. Unfortunately, I've seen definitions of the "Bug-Out-Bag" term that go from a 24 hr contingency kit to something like the INCH (I'm Not Coming Home) bag.

I've dropped the BOB term in describing my kits. I have the big kit in my truck which could easily be an INCH kit with a resupply of food and water. It's really just a kit to keep me going in time of an extended natural or man-made disaster when I'm not home.

That said, having gear in caches is a good resupply tactic. I may cache some stuff at work as a just in case. It's very secure and would be a good location for evacuation.