Premium2000,
What you actually want is entirely possible.

You want an airplane that looks like it should fly in one direction, but flies in the other.

Screw all the theoretical argument about airflow over backward airfoils etc etc etc. They mean well, but have missed the overall purpose. To fake the public out. Ain't hard at all.

Right off the bat, you're locked in to using a pusher prop. And that'll be obvious to some of the intelligent and experienced flyers in your audience. So you're stuck with some risk. OK, let's go with "some risk".

A cambered airfoil or almost all conventional ones are going to be very obvious to a lot of people. A flat plate one will not.
Almost everyone is familiar with ailerons being on the back of the wing. So be a bit deceptive. Use some striping tape and outline some fake ones. And use your covering "paint scheme" to hide the real, out of place, on the "leading edge" ailerons. Cover the ailerons like the almost standard color shemes that have say red leading edge trim on a white wing. Red ailerons, white wing. Only this time the leading edge trim happens to be the ailerons. Add another color "sun ray" on the wing and the mix of many colors will almost hide the fact that the leading edge trim is actually an aileron.

Building the empennage reversed ain't much of a problem. The vertical stab becomes the rudder. The rudder becomes the stab. The horizontal stab becomes the elevator. The elevator the stab. Also add some rear sweeping color trim and the mix of lines will also camoflage which surfaces are now connected to the fuselage that aren't usually connected etc etc etc

And when you crank the sucker up and start to taxi it out "backwards" all the details of that color scheme that seem now to be going backwards will add to the impact. Only then will the most observant and experienced flyers notice that the stab is moving up and down while the elevator seems to be rigidly attached to the fuse, and the LE of the wing seems to be working like ailerons.

Heck, I think it'd be a hoot.

And might just fly ok.
The side area of the fuselage might have to be adjusted to insure you have enough "rudder" area up there.... uh..... back there. And you might need to have a smaller rudder/stab back.... uhh.... forward. And working your nose wheel..... uh, tail wheel will require two pushrods going in opposite directions from the rudder servo.....

I KNOW it'll be a hoot!

Hell, it'll be fun just building the sucker. You want a test pilot?