I don't care about saving fuel. If I wanted to do that I wouldn't have bought a boat I would have bought a Prius.
Like many others, my boat will make wake at idle on 2 screws. I kick one in neutral & ease on down the way.

what causes it to create wake at idle? the size of the prop, drive height, etc? i cant see our rpm's being too far off, but i know your drive is shorter than mine, & your props are definately bigger.

The propeller size seems to be my biggest issue. When I put the 30's on it is really fast on 2 for an idle.

sometimes it not the wake but its traffic congestion and slow cruisers that have me run on one motor

I was stopped by the WI DNR last summer on the St. Croix River when I was idling 5 MPH on both engines. The guy told me to shut one engine down. Apparently no-wake doesn't mean you're not making a wake because I wasn't. To the DNR, it means you're going as slow as physically possible while maintaining steerage.

I run on one because of noise restrictions in Mi. My boat isnt even loud but still gets pulled over when I run both in a no wake.