I have almost lost a few cameras to the environment. I had the kids put a mirrorless camera in a Pelican Box and throw it down a waterfall into a pool so my wife could take pictures of the kids rappelling from the bottom. Safer than trying to have someone catch it, or it would have been if they'd closed the Pelican Box properly (I should have checked). It came open and the camera drowned. No more pictures that day. It worked again several days later after it dried out, good as new. I also once dropped a camera, a DSLR while I was on a scree slope above a slot canyon. I chased the camera as it tumbled toward the abyss, but I wasn't able to gain on it. A tiny shrub managed to catch it just before it plunged over a 30 meter cliff, so lucky. The camera body had a few dings and there was a chip in the lens hood. Later that same day I used that camera to get one of my best pictures ever. I won more money off that one frame than that camera was even worth.
All this is just to say you may be overthinking your storage concerns. I have a camera on my desk right now with dried mud embedded in the grip and focus ring. Sometimes I get around to scrubbing that out with a toothbrush before the next caving trip, and sometimes not.