If you want to fish on the surface why not use mono?
you can troll closer to shore in the spring with the flyline than with just mono or a mono with a single bb shot. the flyline has more a tendency to follow the boat around a point, the mono wants to straighten out and cross over the point. its mostly just early spring when the salmon have the smelt pushed right against the shore. it works well with a small boat and electric motor, i dont fish that shallow with my current boat. watch the guys fishing the beach area at ice out on sebago, some will troll 6 to 10 feet from shore along the beach early april and also in front of the small feedr streams along the west shore