Treat plinking ammo as its own category, not tied to your "stockpiled" ammo . . . even if it's the same caliber, bullet type, etc. If you aren't already doing so, keep a written inventory and start tracking how much ammo you're actually going through. At minimum, you should restock (by purchase or reloading) whatever you use as you use it. In my opinion, reloading components should be counted as exactly that, not as actual available ammo. I keep track of caliber and bullet type (FMJ, JHP, etc.) on both ammo can labels and in an inventory list. The "special occasion" types don't need to get updated very often, as I only use that stuff for testing function in a new firearm, not routine practice.
I don't reload, but I am keenly aware of what I have and how quickly I burn through it. I'd just started shooting 5.56 shortly before Sandy Hook and was building up a supply of it, but was mostly buying 9mm just prior to each upcoming range visit. Well, it wasn't until the shelves were nearly bare that I found myself down to my last couple hundred rounds of 9mm. Friends who do reload were struggling to find components. "Never again," I told myself that day, and now I restock regularly, plus adding a box or two "extra" of each caliber as funds allow.
As far as bugging out is concerned, I keep a few rifle mags loaded in a sling pack, along with a handgun and a couple loaded mags for it. I also have a couple of strategically-placed loaded mags for my CC gun. Everything else is locked in a safe or in ammo cans behind a locked door. Having recently entered the world of parenthood, bugging out is a daunting prospect, and there would be much less room than I'd prefer for guns and ammo, even with the benefit of a vehicle.