Goldenrods, IIRC, do not lower humidity. The silica gel packs will do that, however, they will saturate and need to be "recharged". I bought a dehumidifier very recently (one of those Remington ones which has a window to let you know when it needs to be "recharged"), but it seems it is only mental masturbation.
Why, you ask?
'Cause for the last 10 years my safe has had nothing but weapons inside it, and it sits in my garage. The humidity has been so high in there that the outside of the safe has had condensation thick enough to write your name. Yet, not one rifle has had any ill effects from the moisture in the air.
Not one. Blued, parkerized or anodized. Not one.
Why, you ask?
Oil. Good, old fashioned (quality) oil. And periodic no-nonsense care. Some look beat to hell and back, but not one has an ounce of corrosion, and especially not in the bores.
KISS, my man, KISS. Besides, taking out one of the girls for a wipe down is just good medicine for the soul, and lets her know you still care...