East/Loyola goaltender Will Behsman battled as he faced 38 shots. Several of West's goals came on rebounds.
"Frentz could have had five or six goals tonight," Doell said. "Will played really well and gave them a chance to compete."
The second period went back and forth for about seven minutes, but the Scarlets couldn't be contained for long. Cain Grimm and Kyle Looft scored goals 1:52 apart midway through the period, and Campbell added a power-play goal to increase West's lead to 8-1 by the second intermission.
Galt Goettl scored the lone goal of the third period, which was played with running time.
Goettl and Mettler each finished with a goal and two assists.
West goaltender Jake Spiess stopped 6 of 7 shots for the victory.
West (1-0-0) will host Austin on Thursday. East/Loyola (1-2-0) will host Winona on Friday.