As for the yaw problem.

The fuselage side area is going to need to be larger toward the back and smaller toward the front. It'll need to be smaller especially since you'll need a vertical stab/rudder up front. That stab/rudder needs to be as small as you can get away with.

If you look at Andy Leonard's canard, you'll notice two things that relate to all that. His fuselage projecting forward to the canard has reduced side area. And the fuselage area toward the back has a subfin to increase it's side area and he also has tip fin/rudders that also increase the side area aft. You might need even more side area aft as well, depending on how large your forward fuselage is and how large you need to build your pseudo stab/rudder.

I would suggest that if Andy had painted his Canada Goose canard with a backwards paint scheme and always parked the sucker backwards in the pits, a lot of people would have thought it was a conventional layout. Would it fake out anyone with any aeronautical experience? Nah..... Not if they saw it from 10-20 feet or less. But is that your goal?

What you want is something about as convincing as the flying lawnmower, right?