The baetis i usually tie for stillwater applications are weighted and non weighted...size 14 or 16, with dark muskrat and a pheasant tail...um, tail. when i weight them i slide a dark tungsten bead over the hook and tie it in where the body is, and then dub over it...the whole thing is wrapped in small gold wire, and i make sure to cement the head and tail to make it more durable. make sure you pick the body pretty good to make it appear as fuzzy as possible.
yeah, for the most part a gold ribbed hairs ear will work, along with pheasant tails...size 14 and smaller. for baetis dries a Adams usually works fine.