Oliver H. Olney reports that there is a company in Nauvoo planning to "go as far west as the Rocky mountains."
Oliver H. Olney, Journal, July 2, 1842, in The Writings of Oliver H. Olney: April 1842 to February 1843—Nauvoo, Illinois, ed. Robert G. Moore (Salt Lake City: Greg Kofford Books, 2019), 78-79
As a company is a forming in to the wilderness to go as far west as the Rocky mountains and that without delay.
. . .
As a company is now aforming in to the wilderness to go as far as the Rocky Mountains and that with out delay Yes men women and Children is now in aray To make read[y] a voiage amonst the Natives of the far west Let this subject be look to as this wot they say that they must go whire there is no Law to baffle them in their doings We will now use some reason and say Shall the[y] go west amongs the Indians and abuse the inosent and raise a strife amongst the red men of the forest.