If you're bonefishing in the Keys they're mandatory. Same goes for redfish, snook and trout. A number of my tarpon flies have them too. As far as a weedguard hindering a hookset- don't worry about it because you aren't going to hook a fish with six inches of grass trailing from it. I generally use 16# Mason on all of my bonefish flies tied in horseshoe style. Jim, if you're having a hard time finding it locally, try World Wide Sportsman (they're owned by Bass Pro), Cabelas or Kaufmanns.