I dont know the exact address, but headed south from PDX take the first Wilsonville exit (north wilsonville I believe it is called). Go east about 2 or 3 blocks and turn south. It is only about 2 or 3 blocks south and you will see the line of people to your left. I believe it just north of the Food Services of America distribution warehouse.
Last year they had signs along the road directing you to the sale. Bring some rain gear, you will stand in line at least an hour to get in. And parking is a miserable situation also. I am not kidding about the hour wait to get in.
Sweet prices, but you wait to get it.