Typically the sockeye salmon are just starting to spawn in the Brooks River come early September. 6mm mottled beads in brighter oranges and reds tend to be the best producers.  Mottled Trout Beads in Dark Roe, Mandarin Roe, Tangerine Roe, Natural Roe and Hot Cherry can all be winners.  Also check out Mark's Trout Food.  These are hand painted and really kick butt.  Tryt them in Dark, Natural and Tangerine.  They are a bit more expensive than the commercially packaged beads, but worth every penny!