OK finally back to it. Here are some from my personal library that might fit the bill for what you're looking for.
1. The California Trail by George R. Steward, McGraw-Hill Book Co.
2. The Bloody Bozeman by Dorthy M. Johnson McGraw-Hill Book Co.
3. The American Heritage Book of Great Adventures of the Old West, American Heritage Press.
4. Voices from the Wilderness by Thomas Froncek, McGraw-Hill
5. The Westerners by Dee Brown from Holt, Rinehart and Winston
6. The Devil's Backbone by Jonathan Daniels, McGraw-Hill
7. The Great North Trail by Dan Cushman, McGraw-Hill
I have several others but wasn't able to get to them at this time. Not sure if this is just what you're looking for but maybe so.