Unlike the Native Americans of the Pacific Northwest,
the Nez Perce wanted  nothing to do with the blue beads that the
expedition had run out of.  Instead,  they wanted practical items,
and the expedition still had a few of these left.   Thus trading
proved much easier, and relations friendlier.
Sacajawea's presence with a baby continued to protect
the expedition from Indian  attack.  On the way west, the Nez Perce
had considered killing the expedition  until they saw Sacajawea
with her infant son.  However, as Clark became  increasingly famous
as a healer in the area, it became less likely that any  Native
Americans would threaten the group, since they wanted medical help.
 The  Nez Perce flocked to Clark to receive his healing, and he
used the opportunity  to give speeches about the United States and
Thomas Jefferson, whom he called  the "Great White Father."  However,
his statements to the Indians did not  present the whole truth:
he said that the United States wanted merely to  establish trade,
whereas of course the government had total appropriation in  mind.
 Sacajawea had helped this expedition survive, and now its leaders
began  to pull the wool over the eyes of the Native Americans. 
Sacajawea directly  participated in this too, since Lewis and Clark's
speeches were communicated  through her to a Shoshoni prisoner to
the Nez Perce.  (However, she may not have  known the truth being
concealed).
While Jean Baptiste's illness presented a problem for
the expedition, it was  quite amazing that the baby had survived
so far.  His survival must have largely  been out of luck, but it
also was a testament to Sacajawea's remarkably  meticulous care
that he remained alive while being carried outdoors for over a 
year from St. Louis to the Pacific, through the cold of winter.
 
The expedition's spirits fluctuated wildly during this
period.  When the group  saw the Bitterroot Mountains, they erupted
in happiness, believing they were  almost home.  However, crossing
the mountains proved so difficult and the trail  necessitated so
much backtracking that everyone quickly became upset.  Only the
 help of a Nez Perce guide got them across safely.
Splitting into two groups constituted a dangerous move,
and each group feared it  would never see the other again.  Sacajawea went
with Clark to help the group as  they returned through Shoshoni
country.  As always, Sacajawea was a valuable  guide, helping the
group trace the Shoshoni trails through the region.