for the steelhead (if swinging) i would use anything black or purple with an egg sucking head. egg sucking moal leech,egg sucking marabou tube,small egg sucking intruder. nymphind an egg sucking stone with a rubber legged possienbugger on the dropper will do good.
for trout (depending on where you will be on the river) i would just toss #12 stimulators or nymph with a possie bugger and pheasant tail combo. if you are down low where the river is wide and the runs are broad i would swing a spruce,muddler,or borden special.