Ive caught hords of Coho from the sandy on spinners, mostly size 4 blue foxes, pink and chrome,
also if you are fishing the sandy you can catch loads on corky and yarn, pink with salmon, or fire orange, peach.all of the above.
When the coho run in that river its like a fricken traffic jam. If you want to stay cheep run a corky and yarn with some shrimp scent.
Finally if you do run spinners, its not that harsh of a river. Ive lost many times more on the clack, there are some good holes that you can fish safely on the sandy-
good luck