I believe you would be in violation of the rules in Washington also if you used an attractant in fly fishing only waters.
From the WDFW rules and regulations:
FLY FISHING ONLY
In ?Fly Fishing Only? waters, an angler may
use only the following tackle: up to 2 flies,
each with a barbless single-point hook, not
to exceed ." from point to shank, and a
conventional fly line (other line may be used
for backing or leader if attached to at least
25 feet of fly line). Anglers may not use fixed
spool reels, bait, or weight attached to the
leader or line. Only knotless nets may be
used to land fish.
BAIT
Anything that attracts fish or shellfish by scent
and/or flavor. This includes any device made
of feathers, hair, fiber, wood, metal, glass,
cork, leather, rubber, or plastic, which uses
scent and/or flavoring to attract fish or wildlife.
"The reason you have a good vision is you're standing on the shoulders of giants." ~ Andy Batcho