A blast from the past. These killed it for me on Soda Butte Creek back in the day (early 2000's) when you could find space to stretch out and have some fun; those days are few and far between but the fly still works. They float, they're visible and simple enough to tie that you won't be afraid to cast them into the tightest spots where the trout live, and won't risk drowning to retrieve one if it gets hung up. Here's his SBS if you're interested; change color/size to meet your needs.

hook - Dai Riki 730 #6
thread - Uni 6/0 tan
butt/shellback/head - 2mm foam tan
rib - tying thread (doubled)
body - dubbing tan
wing - deer hair
legs - medium rubber brown
indicator - 1mm foam orange