St. Olaf went on a 32-15 run in the first 12 minutes of the second half after leading 45-41 at the break.
Bergstrom finished with a team-high 16, and Jon Butala had 15 points in the win.
Jeremy Grilley had 13 points to lead Crown.
The Oles outrebounded the Storm 36-15, went 34-39 from line and 9-for-12 from three.
St. Olaf hosts Martin Luther College on Monday at 7:30 p.m. They open league play Wednesday at Augsburg at 7 p.m.
St. Olaf 93, Crown 68 St. Olaf - Hunter 10, Bain 9, Banick 7, Butala 15, Norberg 11, Christensen 7, Clark 4, Vander Woude 5, Bergstrom 16, Haugen 1, McMahon 8 Crown - Jones 9, Berge 12, Dice 10, Zakariasen 9, Howe 2, Hale 4, Bremer 3, Brilley 13, Hall 6 3-pointers - STO 9-12, CC 7-19 Free Throws - STO 34-39, CC 7-12