Some of my observations:
--The vast majority of Capilano steelhead (summers and winters) enter during the months NOT covered by the bait ban (i.e. November through July). So, the bait ban (right or wrong), is not very effective IMO.
--Given the high, year-round pressure on this small system, I would imagine that many steelhead on this system get hooked 1-3 times on average (inferences from Nelson et al. 2004), even in the absence of using bait. I have found that steelhead tend to "shut off" after getting hooked this many times, particularly in combination with low and clear water, which the Cap regularly experiences, so much so that they will move out of the way to let drifting roe pass by (insert Moses reference here). So by banning bait, are we really reducing the angling impacts on these steelhead? Caveat: deep hooking effects associated with bait considered here, nor effects on juveniles (though most in the system are likely hatchery origin).
--The majority of steelhead entering this system are a product of hatchery enhancement. I would suspect that the natural origin/ "wild" component is small in an absolute sense, and especially small compared to the number hatchery origin fish.