Humidity is a real bee atch. I went for close to 30 yrs working in the shop with no AC and thus no humidity control. It just got to be expected that from @ late March through Sept here in PA, everything was going to rust and the wood was going to move all over the place. One learns to adapt, but that doesn't make it any easier! Last few years now I finally cracked open my wallet and put in AC in the shop, and now I guess I have to spend years cursing and kicking myself for not doing it sooner.
Still working on AC for the house. My wife is a lizard - LOVES heat, the more the better. Cold at anything below 80. I'm using the little dog 'babies' as bribery. "Oh those poor little guys, they're SO HOT they can't stop panting!" Forget about me, anything for the dogs!!!!

It's always funny how a buttplate that you inlet and finish off flush in June will be standing about 1/16" proud of the wood all around by Dec or Jan if the piece is still there in the shop. And vice versa!