The visitors held the home side off in a Cascadia Cup battle to seal a spot in the postseason for the fourth year running.
The home side was forced into two injury changes in a hard-fought first half, as John Thorrington and Darren Mattocks both withdrew.
In the second half, Seattle goalkeeper Michael Gspurning came up with a number of key saves to keep his side in the game, before Camilo missed a golden chance to win the game at the death.
Seattle clinched a playoff berth with the result, and currently sits in fourth in the Western Conference. Right behind in fifth place is Vancouver, currently holding FC Dallas off by a slim margin.
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