You probably saw the first few fish to enter the lake. The state doesn't keep track of the counts until mid-june. Check out the following site to follow the counts:
http://www.wa.gov/wdfw/fish/sockeye/counts.htm

If they equal last years counts, you can probably guess there will be a fishery.

I was so dead wrong on last years predictions, so I'm not the one to answer this question. My sources told me last year that there was no way there was going to be a fishery. Ooops. They couldn't have been more wrong.
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T.K. Paker