Thanks for the suggestion. Sorry that my information was so brief.
I had been checking face orientation. I didn't know it would cause materials to bake black. I just knew it caused all kinds of problems if it's not done. So I have been doing that, and all the normals are oriented properly.
I'll add some screenshots below. If anyone spots any problems, please let me know. I'm at a loss.
Here's my bake settings:
And this is the shading view. I'm trying to bake textures for that front wall, and I'm using only one material. Originally it was two, but I simplified it to try and isolate the problem. The wall is built with an array modifier for the bottom two logs, and a boolean for the doors and windows. The only setting in the nodes I've found that made any difference is the emissions in the Principled BSDF. If I make that white, I get a milky color to the wood textures. But no other settings seem to make a difference.
Here's the wall by itself, with all else hidden, including the lighting.
And here's the bake I get: