I have fished the Toutle and Cowlitz using spawn sacs.The results were pretty good.I also think you might have a little better hook up ratio because the sacks tend to get caught in their teeth.My thought anyhow.
You can buy a little kit at most sporting good stores that have a stand you put your mesh on,put your eggs on next,push it through the hole,slide the stand together and tie them of with stretch thread.Works pretty slick.