Make sure to pack a bunch of these (the fake one that is). Andy Burk's October Caddis Nymph.
If you want to fish some dries, pack some of these, as well. Rick Anderson's Parachute Bird of Prey October Caddis.
If you decide to buy some of these flies, you may want to slim the tail down some. Compared to some of the originals that were tied for sampling, the factory ties are slightly overdressed.
Have fun on your trip.
Edit: Here's another fly. You can find the recipe, here