Mormon Pioneer Overland Travel, 1847–1868
Here is a list of companies from LDS.org. I assume most of these came to Utah. I had never seen this database before. You can find the list at http://www.lds.org/churchhistory/library/pioneercompanylist-alpha/0,15764,3967-1,00.html
. It is a great resource and has the names of most of the Utah Pioneers.