the alewife's is more of a spring thing......
this time of year the salmon are very close to shore and most likely are being caught by people casting spoons at the river mouths and up stream a bit. the kings are coming in to spawn right now and should be running up the rivers. there are several lures that do work this time of year when trolling behind your boat.
u-20 flatfish, fluter spoons -- such as northport and southport nailers, or any spoons that are made like them --, little cleos, jewels, kracodel spoons, large crank baits such as big-a's and big-o's from bagley, yes the huskie jerks will work and so will fat raps.
colors to use are......organ, silver, black, chartreuse, copper, blue, red.......all these are in combos with one or the other.....like silver/blue, silver/organ, copper/blue, copper/yellow, black with a silver or prism strip across the middle at an angle from to bottom.....these are spoon colors and they will work on the u-20's also.
the best time of day for your best chance of hanging a salmon, is early morning -- before sunrise -- and late evening -- after sunset -- that doesn't mean you can not get hook-ups during the day, because you can. its just thats when the fish are more apt to be moving and most of the time there is less pressure on the water.
i would like to add, that this time of the year if you are out trolling. i would put a husky jerk out behind the boat on at least 1 rod. because the walleyes are cruising close to the shore near the river mouths also.