First I can think of only a handful of climbing areas in the United States that have signs pointing you to the direction of the climbs. Second, now that trout is as known as just about any other place in oregon that peopel try and keep on the DL, like Moolack, Ozone, and trout, the idea that someone is actually going to go trapping along the banks of the deshutes looking for this crag is dumb. No one is going to do that.
Trout is unique becasue of the setting, the quality of the routes, the type of climbers it brings to climb there, not how you found it.