There are steelhead in Norrish. You just have to put in your time, research a bit, and work a little harder to get them...I believe that one year the norrish was even stocked with chilliwack river strains...like any low profile stream, river or creek in the lower mainland, steelhead return there, be it in almost non-existent numbers, to sometimes surprisingly good returns...
Many who enjoy the solitude and uniqueness of many smaller systems practice catch and release only, whatever you decide to do, fish within the regs, but also consider why many locals would choose to practice C&R...
Go out, explore...and of course, fish responsibly.
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