For Bennett, I'd probably tie some #16, 18 renegades, #12, #14 cracklebacks in several colors, Hare's ear nymphs in several sizes, red pheasant tail nymphs, lots of sizes, and for those times when they just won't hit anything, I'd have some peach glo balls on hand. For my personal favorite on Bennett or Taneycomo I'd recommend soft hackles in yellow, orange, olive, brown, maybe black and cream.
Oh, and griffith's gnats.