IF she can carry all of the weight of the characters, their equipment and animals, she could do it.<br/><br/>I would say that it would require 2 climb checks, one at the start and end, an acrobatic's check to keep everyone on as she threaded her way around the rocks, downed shrubbery and whatever trees survived, an acrobatics check to keep everyone in place with a higher DC for the terrain and surface and finally,her pace will still be half speed to avoid more checks.<br/><br/>And, that's for each trip.<br/><br/>It's doable, my big concern is all of the weight on a potentially unstable surface with winds and no cover at all against the cold.