Davy:
I'll see if I can post some pictures, but my two favorite hendrickson patterns are a nymph with SLF fiery brown blended with brown quick descent dubbing & wood duck flank tails and legs, and harold's parachute emerger pattern which is tied in reverse on a swimming nymph hook. Though, to be honest, given hendrickson's start coming off about an hour after the hatchery truck arrives, a ball of yarn is adequate in this neck of the woods.