Would keeping it in the unheated garage (I live in Michigan) matter vs the house?
Yes for permeation.
Moisture (vapor) travels from warm (moist) to cold (dry)...at least that's how it works in an insulated wall (and why you need a vapor retarder in wall construction in certain climates.
Should be better in a controlled environment.
addict:to devote or surrender (oneself) to something habitually or obsessively ....hmmmm
