I would suggest you get a copy of Fly Fishing for Coastal Cutthroat Trout by Les Johnson. The book is a treasure of information on fishing for Cutthroats in the salt and rivers. The book has several hundred flies that work in different environs. One of my favorite river flies is the Reverse Spider. Preston Singletary will be tying the Reverse Spider at Orvis in Bellevue this Saturday. He is a local expert on fishing cutts in local rivers. Preston will gladly share some of his formulas for success.
The book is available at local libraries. Most likely, you can have it signed by Les at Orvis on Saturday. Good luck, Steve