Not overkill at all, honestly that’s pretty much the ideal setup, especially with kids around. I used to think I was being overly cautious too, but after a couple seasons I realized most of the “weird” problems I had weren’t chemistry mistakes, they were storage problems.
I keep mine in a small locked shed as well, shaded most of the day, dry, and with a bit of airflow so fumes don’t hang around. The big thing for me was keeping everything off the floor. Moisture sneaks in way more than you think, and once chlorine starts clumping or smelling off, it doesn’t behave the same in the water. I also separate chlorine products from acids and balance stuff, not because I expect a spill, but because if something does leak you don’t want a bad combo sitting together.
One thing I didn’t think about early on was how storage affects consistency. When my chemicals were getting hot or damp, chlorine demand felt random and pH was harder to predict. Once I cleaned that up and stuck with the same basics, mostly aquadoc stuff for me, dosing became way more predictable and boring, which is a good thing.
Locking it up isn’t paranoid, it’s just removing risk. Kids safety, pets, fewer storage surprises, and chemicals that actually work the way they’re supposed to. Peace of mind alone makes it worth it. Anyone else notice their water got easier to manage once storage was dialed in?