Fishing in SW Utah?

I'm planning on heading out to the Zion/Bryce area in the next
two weeks for a vacation. Main purpose is not fishing, but I
was wondering if I should even bother to bring my gear.

Zion and Bryce webpages barely even mention fishing and
web searches seem to say that the fishing is poor. I'll be
driving out through Oregon and Idaho, but don't expect to
dawdle much on the way there or back.

Opinions?
- Ken