I’ve never had a problem hanging them on the wall, but that’s also here in TX. I do keep an eye on the humidity levels in the house, but thankfully it’s not been a problem for me and all mine are on the walls.
BTW, Alex, I love that Blueridge you have there. I’ve got a BR-240A that I love to play.
I wish I could do the 4 finger G chord! Due to having broken my fingers so much when I was younger, I can”t get my ring and little finger that close to play a 4 finger G chord, so I’m stuck with the 3 finger version. I’d like to do the 4 finger version instead.