Camilo broke a scoreless tie in the 60th minute, converting a cross from Nigel Reo-Coker following a long run from his own side of the field.
Miller then added an insurance tally in the 74th on a right-footed shot from the box after Reo-Coker's failed first-shot attempt as the Whitecaps (10-7-6) stayed within the Top 5 in the Western Conference.
San Jose fell to 8-10-6.
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