It is amazing that such a simple question could cause such diligent research on my part. It took lots of research and, finally, me picking up my copy of the book itself to find the answer to your question, but I finally did. Requesting peace is key (with a side note of alcohol and trading beads).
Let me begin by saying that much of the interaction with natives in James Daugherty's, Of Courage Undaunted is simplistic in nature and utilizes many stereo types.
The only dated aspect of Daugherty’s treatment appears in connection with the Sioux and other tribes, who are stereotypically described as “surly” and “plundering.” Accounts of native customs are kept to a minimum, and the Native American characters themselves are simplified.
This narrative of Lewis and Clark's adventures and exploration is told from very personal points of view and helps the reader immerse themselves in this historical time period. There are many areas of the expedition which are told in a manner consistent with the journals of Lewis and Clark. Although fictional in nature, one can imagine themselves part of this adventure.
With the interactions with the natives, their requests are demonstrated to Lewis and Clark in a very simplistic manner. In essence, they are portrayed as requesting peace with "the Great White Father" in Washington, trinkets such as trading beads, and alcohol or whiskey. This does create a conundrum in the historical fiction genre of Daughtery's book as so much realism is used in other areas.