I might have figured part of this out. As I've posted elsewhere - both under the surface and often exposed, this mountain is mostly massive granite structure and boulders with shallow (12-18") pockets of dirt. The ideal underground, or partially underground, food cellar just isn't feasible...
There is a 10x24 spot, about 40' east of the kitchen door, where I could build a combination carport/storage shed. Kinda like this:
The spot is protected from the wind by the mountain rising right behind it, and there's already good strong fir trees just outside each 10x24 corner (which is what's giving me the size) that would shade it from summer sun. I will need to heavy insulate, or maybe better yet - store nothing in glass jars or anything that would be affected by freezing; cause it will freeze but maybe not hard...
Also, I was thinking about the shed being a concrete block structure (wildfires)...but if fire takes this mountain, losing the food would be the least concern. Then again, having the food might be really nice while we rebuild, if and when.
Lot's to plan. All thoughts and ideas welcome.