Campbell will compete for Team USA in July in South Korea and in August in Russia.
Monica Dornick, Noelle Tarazona and Madison White each won twice on Saturday.
Gallagher has been a part of the U.S. National Team as a player, assistant and head coach.
The Bruins won 11 of 14 races, including a pair of wins by juniors Katie Kinnear and Arlyn Upshaw.
The Bruins return 24 letterwinners from last year's squad which finished fourth in the Pac-12.