All great advice above. I would add this. Bobbers and trolling are not the only options. I have found that when fishing sinking lines a variety of strip retrieves generally outfishes a straight troll by about five to one. Try different retrieves- strip pause, hand twist, short , short, long, etc...
Restocking his fly which has been very good for me this spring. I think of it primarily as a younger damsel, but it is small enough to possibly pass as a mayfly. Anyway, it works and is cheap and simple to tie.
Hook: Daiichi 1710 or TMC 5262 #12
Tail: Olive marabou
Rib- chartreuse or hot yellow...
The desert is blooming and will be beautiful for the next couple of weeks.
Lupine
Sagebrush false dandelion
Phlox
Cabbage butterfly on dandelion
Balsom Root
South slope of Rattlesnake Mountain