The largest trout I have ever seen caught was at a fishing platform at a state park. The guy who caught it saw the fish the day before cruising for floating food pellets and found some the DNR guys dropped when they filled their bucket. Food pellet flies can be a good way to "match the hatch" if the state is feeding the fish in an area. There are also plastic corn you could put on a hook and cast with a fly rod. and of course eye patterns.