Sacajawea was Shoshone, lived with more eastern plains tribes and was married to a "whiteman" so I would presume she would favor the styles she knew how to make. The coastal Indians they spent so much time around during that winter at Ft. Clatsop didn't wear buckskin/Indian dressed leather because of the continual damp. Their clothing (when they wore any) was made of natural fibers and what was traded to them by coastal European traders. Sacajawea would have replaced her clothing and that of Pomp by making it as she was used to making it and from the dressed elk and perhaps deer hides brought in by Lewis and Clark's men.

Beautiful brown leather fringed dress with beading.