Based on the clue 'at least the antarctic range named for this henry ...', what is the answer?

What is associated with: at least 62 wagons reenacted this religious groups 1847 trek from illinois to nebraska to utah? Based on the clue 'at least a dozen of this babylonian kings 282 laws...', what is the answer? Based on the clue 'at least grin at workaholics nick swardsons prete...', what is the answer? What is associated with: at least temporarily in 1955 this cuban went into exile in mexico but forces led by him return… Based on the clue 'at least this restriction dad put on you isnt a du...', what is the answer? Based on the clue 'at length did cross an albatross through the fog i...', what is the answer? Based on the clue 'at less than 950 feet mt davidson is the highest p...', what is the answer? Based on the clue 'at lewiston in this state the snake river turns we...', what is the answer?