Equipment storage with humidity control?

Chicago IL

Description

I need to store my gear for a few months. In the climate-controlled storage facilities I'm aware of, temperature is controlled but not humidity. Low humidity causes acoustic guitar tops to crack and for frets to sprout beyond the edges of the fingerboard. I use case humidifiers, but I'll be unable to constantly replenish them this winter. Are there any facilities in Chicago that maintain humidity and are safe for storing instruments? Thanks!