[Council of Fifty]
News of the multitribe gathering that they believed would occur in June reshaped the goals of the mission, as they believed they could accomplish some of their purposes, including meeting with various tribes and discussing possible alliances, at the gathering rather than in extensive journeys. ... Council members again discussed destinations for possible settlement, including Upper California. Council members continued to express hostility against federal and state governments and the Gentiles as well as optimism that a Mormon-Indian alliance against the Gentiles would be successful.
.. [Brigham Young] declared that California might answer the Saints' needs—including offering "a place of rest for a little season" and access to the Pacific to send missionaries "to the eastern nations." However, he emphasized that such a solution would be only temporary, since the Latter-day Saints were still under divine commandment to build a temple in Jackson County, Missouri. ...
[Joseph Smith Papers: Council of Fifty, Minutes, March 1844-January 1846]