I've got a banjo, a guitar, a fiddle and a ukulele. I'm trying to figure out how to keep them on board. What to use for cases, how to stow; that sort of thing.
I use a regular hard shell case and keep it out of the sun. I was fortunate enough to have a guitar made in Vancouver. I figured it was at least used to high humidity if not the southern temps. Been several years now with no problems.
Oh yeah, coated strings are recommended.