The action itself speaks to her priorities.

That her positioning near the Columbia River to await spring canoes was a strategic decision based on her understanding of the fur-trade logistics.

This is explicitly stated by the sources and is consistent with what she knew about the trade.

What is not established:

The exact details of how she built shelter, what specific food sources she used beyond the horse she killed, what route she followed through the mountains, or what conversations she had with the Walla Walla people.

These details do not appear in the available sources with sufficient specificity to reconstruct reliably.