JJ - seen mnay a Dobson fly and even felt their "bite" one night around a RS rodeo campfire grabbing one with my beer goggles on. Mistake. Cool bugs.
Back in the late 90's, locals swore by Case's black helgies. I still have a boat load of them, but never manage to catch anything big on them. Moved up to Case's larger hellgamite and fishing was slower, but size improved.
fyi - If you're thinking about trying Case, when Charlie sold the company, the plastic receipe changed.