Buckspen,
I, like you, have a very dry " mans' basement"; helped(physically) my contractor build my house in 1989 and not huge, expansive house but all the "extras" to not have problems, leaks, make use of the environment....we did,
and have never had any moisture problems. I still used the electric cord hole where the motor would have been to add dehu. rods, lighting, removed gaskets, etc. etc. NEVER ANY PROBLEM on any sheaths( all stored there), leather rifle slings(WWI&II) and laterAND my only ivory grips are beautiful (to me) on my Colt. I do like and use Ren. wax on whatever I want BUT not everything as I like to fondle my knives whenever possible.
Best to you.
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Duke;RKS#5567
RKCC-CM-087
Southwest VA