After they have dispersed in the river, they will find a spot to hang out. They will face upstream, waiting for different food sources to come to them on the current. If not enough food is coming to them, they will cruise to find it. They will exert as little energy as possible, so deep pools with little current on the botom, behind rocks and boulders which break the current allow them to rest while waiting. What do they eat in your stream? Bugs, crayfish and other smaller crustaceans, fish, worms after a heavy rain? Figure that out and you're more likely to trigger strikes on a consistant basis. Get on the internet and learn all you can about the prey you are chasing. You are a predator as they are, think and act like one. Food sources will likely be different for the Rainbows and Browns with some crossover, but sould be the reason you are catching more Rainbows.
JustDave

Living Large in Oregon
Life Member Since '94,
1st Member of the NAFC Western Fishers,
Proud User of St. Croix, Lamiglass, Shimano, Fishcraft, Mercury,
Jabber Knuckles,
Fishing With the Boys Guide Service