I don't know FlyBum, I've fished the Little Deschutes every year for about 6 years, and we always do pretty well. If you stay around Crescent and Gilchrist, the water is clear and fast-moving. The advantage of the Little Deschutes is that bait is legal. Though I've never tried it here, a grasshopper floated on the surface with a tiny hook through it can land you some of the nice browns that hang out under the undercut banks.
We usually fish the Little Deschutes, Crescent Creek, Hemlock Creek, and a few more small streams up there during the bow season opener. We fish the middle of the day and hunt mornings and evenings. The confluence of Hemlock Creek and the Little Deschutes is one of the only places I know of where you can catch Redbands, Brookies, and Browns without moving.
Still, I usually only catch fish in the 6-14" range, but you catch a lot of em. I would advise against using bait, because it usually kills the fish. Expect about 10 fish an hour.