We just started a Pioneers unit study by Amanda Bennett. It is a notebooking program. So far, it looks like it will be a good unit study although easy to get bogged down doing every exercise listed. I did that with her American Government unit study so I'm being much more careful this time around! Here is the outline of people and events we will study.
Thomas Jefferson, including Louisiana Purchase, Lewis and Clark, and Sacagawea
The Monroe Doctrine
Jedediah Smith, including the Santa Fe Trail, Oregon Trail, Mormon Trail, Mormon Battalion Trail
Zebulon Pike including the Pony Express
Jim Bridger and the Gold Rush, Trascontinental Railroad, and Homestead Act
John Deere and the Manifest Destiny
Henry Wadsworth Longfellow's The village Blacksmith
The only major omissions I saw were Brigham Young, considered to be the greatest colonizer of the American West and the Mormon Battalion which began several major settlements in California and built a road through the southwestern United States used by settlers. We will study those as well.