I doubt that a flyrod and a beamier boat is helpful advice for the OP.
What works for me (I hestitate to say every time) while trolling is to use a small down rigger ahead of the spoon. This gets the spoon below the surface commotion and is killer on blues and Spanish mackeral here on the banks. While not as "sporting" as flyfishing perhaps, I eat fish often. Nothing however equals fishing around structure. Structure equals fish. The boat doesn't matter at all.