Hunting sea trout demands great patience and a good car. You also need good flies and sea trout likes shrimps very much. These are two simple but effective patterns. One of them is made with ice chenille and the other with cdc. Just use a clamp for the cdc and spin it with any kind of thread.
This is sea trout food!
This pattern is very easy to tie and do not demand a lot of expensive materials. It originates from Iceland. It consists of hackle stems and then hackle is used as body. You can put in som cdc, flash materials or as in this picture some arctic fox. These ones is tied on a double hook intented for salmon, but it`ll work just as well on a single hook. Go ahead and tie some!